Справочник MCP-инструментов.
Пять метаинструментов: точные входные и выходные JSON Schema.
MCP этого стенда: https://context4.me/mcp.
Это полный стабильный набор глобального /mcp. Инструменты конкретных сервисов обнаруживаются через поиск и получение схем; их список зависит от каталога и прав. Правила подключения и обработки ошибок — AI и MCP. Строгие входные схемы отвергают неизвестные поля. У arguments дополнительно проверяется сериализуемость и предел 65 536 символов JSON; пользовательская проверка Zod не представима стандартным JSON Schema.
CONTEXT4_SEARCH_TOOLS
Search Context4 for provider tools needed for a task. Results include connection readiness.
Входная схема
{
"$schema": "http://json-schema.org/draft-07/schema#",
"type": "object",
"properties": {
"query": {
"type": "string",
"minLength": 2,
"maxLength": 500
},
"connector_id": {
"anyOf": [
{
"type": "string",
"pattern": "^[a-z0-9][a-z0-9-]{1,78}$"
},
{
"type": "string",
"minLength": 2,
"maxLength": 80,
"pattern": "^[a-z][a-z0-9-]*$"
}
]
},
"limit": {
"default": 10,
"type": "integer",
"minimum": 1,
"maximum": 20
},
"tags": {
"maxItems": 5,
"type": "array",
"items": {
"type": "string",
"enum": [
"read-only",
"destructive",
"idempotent",
"open-world",
"curated"
]
}
},
"exclude_tags": {
"maxItems": 5,
"type": "array",
"items": {
"type": "string",
"enum": [
"read-only",
"destructive",
"idempotent",
"open-world",
"curated"
]
}
}
},
"required": [
"query"
],
"additionalProperties": false
}Выходная схема
{
"$schema": "http://json-schema.org/draft-07/schema#",
"type": "object",
"properties": {
"tools": {
"type": "array",
"items": {
"type": "object",
"properties": {
"tool_slug": {
"type": "string",
"minLength": 3,
"maxLength": 240,
"pattern": "^[a-z][a-z0-9-]*\\.[a-z][a-z0-9_.-]*$"
},
"connector_id": {
"anyOf": [
{
"type": "string",
"pattern": "^[a-z0-9][a-z0-9-]{1,78}$"
},
{
"type": "string",
"minLength": 2,
"maxLength": 80,
"pattern": "^[a-z][a-z0-9-]*$"
}
]
},
"name": {
"type": "string",
"minLength": 1,
"maxLength": 160
},
"description": {
"anyOf": [
{
"type": "string",
"maxLength": 2000
},
{
"type": "null"
}
]
},
"tags": {
"maxItems": 5,
"type": "array",
"items": {
"type": "string",
"enum": [
"read-only",
"destructive",
"idempotent",
"open-world",
"curated"
]
}
},
"connection_status": {
"type": "string",
"enum": [
"connected",
"connection_required",
"multiple_connections"
]
}
},
"required": [
"tool_slug",
"connector_id",
"name",
"description",
"connection_status"
],
"additionalProperties": false
}
},
"next_cursor": {
"type": [
"string",
"null"
]
}
},
"required": [
"tools",
"next_cursor"
],
"additionalProperties": false
}CONTEXT4_GET_TOOL_SCHEMAS
Get exact input and output schemas for tool slugs returned by tool search.
Входная схема
{
"$schema": "http://json-schema.org/draft-07/schema#",
"type": "object",
"properties": {
"tool_slugs": {
"minItems": 1,
"maxItems": 20,
"type": "array",
"items": {
"type": "string",
"minLength": 3,
"maxLength": 240,
"pattern": "^[a-z][a-z0-9-]*\\.[a-z][a-z0-9_.-]*$"
}
}
},
"required": [
"tool_slugs"
],
"additionalProperties": false
}Выходная схема
{
"$schema": "http://json-schema.org/draft-07/schema#",
"type": "object",
"properties": {
"tools": {
"type": "array",
"items": {
"type": "object",
"properties": {
"tool_slug": {
"type": "string",
"minLength": 3,
"maxLength": 240,
"pattern": "^[a-z][a-z0-9-]*\\.[a-z][a-z0-9_.-]*$"
},
"connector_id": {
"anyOf": [
{
"type": "string",
"pattern": "^[a-z0-9][a-z0-9-]{1,78}$"
},
{
"type": "string",
"minLength": 2,
"maxLength": 80,
"pattern": "^[a-z][a-z0-9-]*$"
}
]
},
"name": {
"type": "string",
"minLength": 1,
"maxLength": 160
},
"description": {
"anyOf": [
{
"type": "string",
"maxLength": 2000
},
{
"type": "null"
}
]
},
"input_schema": {},
"output_schema": {
"anyOf": [
{},
{
"type": "null"
}
]
}
},
"required": [
"tool_slug",
"connector_id",
"name",
"description",
"input_schema",
"output_schema"
],
"additionalProperties": false
}
},
"missing": {
"type": "array",
"items": {
"type": "string",
"minLength": 3,
"maxLength": 240,
"pattern": "^[a-z][a-z0-9-]*\\.[a-z][a-z0-9_.-]*$"
}
}
},
"required": [
"tools",
"missing"
],
"additionalProperties": false
}CONTEXT4_MANAGE_CONNECTIONS
List connected accounts or create a hosted authorization link.
Входная схема
{
"$schema": "http://json-schema.org/draft-07/schema#",
"oneOf": [
{
"type": "object",
"properties": {
"action": {
"type": "string",
"const": "list"
},
"connector_id": {
"anyOf": [
{
"type": "string",
"pattern": "^[a-z0-9][a-z0-9-]{1,78}$"
},
{
"type": "string",
"minLength": 2,
"maxLength": 80,
"pattern": "^[a-z][a-z0-9-]*$"
}
]
}
},
"required": [
"action",
"connector_id"
],
"additionalProperties": false
},
{
"type": "object",
"properties": {
"action": {
"type": "string",
"const": "connect"
},
"connector_id": {
"anyOf": [
{
"type": "string",
"pattern": "^[a-z0-9][a-z0-9-]{1,78}$"
},
{
"type": "string",
"minLength": 2,
"maxLength": 80,
"pattern": "^[a-z][a-z0-9-]*$"
}
]
},
"display_name": {
"type": "string",
"minLength": 2,
"maxLength": 120
},
"return_path": {
"type": "string",
"minLength": 1,
"maxLength": 512,
"pattern": "^\\/(?!\\/)[A-Za-z0-9/_.-]*$"
}
},
"required": [
"action",
"connector_id"
],
"additionalProperties": false
}
]
}Выходная схема
{
"$schema": "http://json-schema.org/draft-07/schema#",
"oneOf": [
{
"type": "object",
"properties": {
"status": {
"type": "string",
"const": "listed"
},
"connections": {
"type": "array",
"items": {
"type": "object",
"properties": {
"connection_id": {
"type": "string",
"format": "uuid",
"pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$"
},
"connector_id": {
"anyOf": [
{
"type": "string",
"pattern": "^[a-z0-9][a-z0-9-]{1,78}$"
},
{
"type": "string",
"minLength": 2,
"maxLength": 80,
"pattern": "^[a-z][a-z0-9-]*$"
}
]
},
"display_name": {
"type": "string",
"minLength": 1,
"maxLength": 120
},
"status": {
"type": "string",
"enum": [
"pending",
"active",
"degraded",
"revoked",
"failed"
]
}
},
"required": [
"connection_id",
"connector_id",
"display_name",
"status"
],
"additionalProperties": false
}
}
},
"required": [
"status",
"connections"
],
"additionalProperties": false
},
{
"type": "object",
"properties": {
"status": {
"type": "string",
"const": "authorization_required"
},
"connection_id": {
"type": "string",
"format": "uuid",
"pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$"
},
"connect_url": {
"type": "string",
"maxLength": 2048,
"format": "uri"
},
"expires_at": {
"type": "string",
"format": "date-time",
"pattern": "^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))T(?:(?:[01]\\d|2[0-3]):[0-5]\\d:[0-5]\\d(?:\\.\\d+)?(?:Z|([+-](?:[01]\\d|2[0-3]):[0-5]\\d)))$"
},
"instruction": {
"type": "string",
"minLength": 1,
"maxLength": 500
}
},
"required": [
"status",
"connection_id",
"connect_url",
"expires_at",
"instruction"
],
"additionalProperties": false
},
{
"type": "object",
"properties": {
"status": {
"type": "string",
"const": "credentials_required"
},
"connect_url": {
"type": "string",
"maxLength": 2048,
"format": "uri"
},
"instruction": {
"type": "string",
"minLength": 1,
"maxLength": 500
}
},
"required": [
"status",
"connect_url",
"instruction"
],
"additionalProperties": false
},
{
"type": "object",
"properties": {
"status": {
"type": "string",
"const": "active"
},
"connection": {
"type": "object",
"properties": {
"connection_id": {
"type": "string",
"format": "uuid",
"pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$"
},
"connector_id": {
"anyOf": [
{
"type": "string",
"pattern": "^[a-z0-9][a-z0-9-]{1,78}$"
},
{
"type": "string",
"minLength": 2,
"maxLength": 80,
"pattern": "^[a-z][a-z0-9-]*$"
}
]
},
"display_name": {
"type": "string",
"minLength": 1,
"maxLength": 120
},
"status": {
"type": "string",
"enum": [
"pending",
"active",
"degraded",
"revoked",
"failed"
]
}
},
"required": [
"connection_id",
"connector_id",
"display_name",
"status"
],
"additionalProperties": false
}
},
"required": [
"status",
"connection"
],
"additionalProperties": false
}
]
}CONTEXT4_WAIT_FOR_CONNECTIONS
Wait for a hosted authorization flow to become active.
Входная схема
{
"$schema": "http://json-schema.org/draft-07/schema#",
"type": "object",
"properties": {
"connection_id": {
"type": "string",
"format": "uuid",
"pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$"
},
"timeout_seconds": {
"default": 30,
"type": "integer",
"minimum": 1,
"maximum": 60
}
},
"required": [
"connection_id"
],
"additionalProperties": false
}Выходная схема
{
"$schema": "http://json-schema.org/draft-07/schema#",
"type": "object",
"properties": {
"status": {
"type": "string",
"enum": [
"active",
"pending",
"failed",
"revoked",
"degraded"
]
},
"connection": {
"type": "object",
"properties": {
"connection_id": {
"type": "string",
"format": "uuid",
"pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$"
},
"connector_id": {
"anyOf": [
{
"type": "string",
"pattern": "^[a-z0-9][a-z0-9-]{1,78}$"
},
{
"type": "string",
"minLength": 2,
"maxLength": 80,
"pattern": "^[a-z][a-z0-9-]*$"
}
]
},
"display_name": {
"type": "string",
"minLength": 1,
"maxLength": 120
},
"status": {
"type": "string",
"enum": [
"pending",
"active",
"degraded",
"revoked",
"failed"
]
}
},
"required": [
"connection_id",
"connector_id",
"display_name",
"status"
],
"additionalProperties": false
},
"retry_after_ms": {
"anyOf": [
{
"type": "integer",
"exclusiveMinimum": 0,
"maximum": 9007199254740991
},
{
"type": "null"
}
]
}
},
"required": [
"status",
"connection",
"retry_after_ms"
],
"additionalProperties": false
}CONTEXT4_MULTI_EXECUTE_TOOL
Execute up to 20 discovered tools through tenant-scoped connections.
Входная схема
{
"$schema": "http://json-schema.org/draft-07/schema#",
"type": "object",
"properties": {
"tools": {
"minItems": 1,
"maxItems": 20,
"type": "array",
"items": {
"type": "object",
"properties": {
"tool_slug": {
"type": "string",
"minLength": 3,
"maxLength": 240,
"pattern": "^[a-z][a-z0-9-]*\\.[a-z][a-z0-9_.-]*$"
},
"arguments": {},
"connection_id": {
"type": "string",
"format": "uuid",
"pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$"
}
},
"required": [
"tool_slug",
"arguments"
],
"additionalProperties": false
}
}
},
"required": [
"tools"
],
"additionalProperties": false
}Выходная схема
{
"$schema": "http://json-schema.org/draft-07/schema#",
"type": "object",
"properties": {
"results": {
"type": "array",
"items": {
"oneOf": [
{
"type": "object",
"properties": {
"status": {
"type": "string",
"const": "succeeded"
},
"tool_slug": {
"type": "string",
"minLength": 3,
"maxLength": 240,
"pattern": "^[a-z][a-z0-9-]*\\.[a-z][a-z0-9_.-]*$"
},
"execution_id": {
"type": "string",
"format": "uuid",
"pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$"
},
"result": {}
},
"required": [
"status",
"tool_slug",
"execution_id",
"result"
],
"additionalProperties": false
},
{
"type": "object",
"properties": {
"status": {
"type": "string",
"const": "pending"
},
"tool_slug": {
"type": "string",
"minLength": 3,
"maxLength": 240,
"pattern": "^[a-z][a-z0-9-]*\\.[a-z][a-z0-9_.-]*$"
},
"execution_id": {
"type": "string",
"format": "uuid",
"pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$"
},
"retry_after_ms": {
"type": "integer",
"exclusiveMinimum": 0,
"maximum": 9007199254740991
}
},
"required": [
"status",
"tool_slug",
"execution_id",
"retry_after_ms"
],
"additionalProperties": false
},
{
"type": "object",
"properties": {
"status": {
"type": "string",
"const": "error"
},
"tool_slug": {
"type": "string",
"minLength": 3,
"maxLength": 240,
"pattern": "^[a-z][a-z0-9-]*\\.[a-z][a-z0-9_.-]*$"
},
"error_code": {
"type": "string",
"enum": [
"authentication_required",
"permission_denied",
"connection_required",
"connection_ambiguous",
"connection_default_required",
"workspace_changed",
"authorization_pending",
"tool_not_found",
"invalid_arguments",
"rate_limited",
"execution_pending",
"execution_failed",
"internal_error"
]
},
"message": {
"type": "string",
"minLength": 1,
"maxLength": 500
}
},
"required": [
"status",
"tool_slug",
"error_code",
"message"
],
"additionalProperties": false
}
]
}
}
},
"required": [
"results"
],
"additionalProperties": false
}