Relay — agent service discovery

by site.chatgpt.orellise.relay-agent-services

Get service details

get_service

Read-onlyIdempotent

Read one full catalogue entry, including documentation links, pricing caveats and source check date. Does not connect to the provider.

Input Schema

Name	Required	Description	Default
`slug`	Yes	Exact published service slug returned by search_services; do not pass a URL or display name.

Output Schema

Name	Required	Description	Default
No arguments

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedNov 1, 2026

changedOutput schema / anyOf

Previous value: -[
-  {
-    "additionalProperties": false,
-    "properties": {
-      "service": {
-        "additionalProperties": false,
-        "properties": {
-          "auth": {
-            "enum": [
-              "api-key",
-              "oauth",
-              "wallet-payment",
-              "none",
-              "unknown"
-            ],
-            "type": "string"
-          },
-          "capabilities": {
-            "items": {
-              "type": "string"
-            },
-            "type": "array"
-          },
-          "category": {
-            "enum": [
-              "search",
-              "extraction",
-              "data",
-              "browser",
-              "documents"
-            ],
-            "type": "string"
-          },
-          "color": {
-            "type": "string"
-          },
-          "description": {
-            "type": "string"
-          },
-          "docsUrl": {
-            "type": "string"
-          },
-          "endpoint": {
-            "type": [
-              "string",
-              "null"
-            ]
-          },
-          "featured": {
-            "type": "boolean"
-          },
-          "id": {
-            "type": "string"
-          },
-          "name": {
-            "type": "string"
-          },
-          "notes": {
-            "type": "string"
-          },
-          "pricing": {
-            "additionalProperties": false,
-            "properties": {
-              "checkedAt": {
-                "anyOf": [
-                  {
-                    "anyOf": [
-                      {
-                        "format": "date",
-                        "type": "string"
-                      },
-                      {
-                        "format": "date-time",
-                        "type": "string"
-                      }
-                    ]
-                  },
-                  {
-                    "type": "null"
-                  }
-                ]
-              },
-              "model": {
-                "enum": [
-                  "free",
-                  "freemium",
-                  "usage-based",
-                  "subscription",
-                  "unknown"
-                ],
-                "type": "string"
-              },
-              "summary": {
-                "type": "string"
-              },
-              "url": {
-                "type": [
-                  "string",
-                  "null"
-                ]
-              }
-            },
-            "required": [
-              "model",
-              "summary",
-              "url",
-              "checkedAt"
-            ],
-            "type": "object"
-          },
-          "protocols": {
-            "items": {
-              "enum": [
-                "MCP",
-                "REST",
-                "x402"
-              ],
-              "type": "string"
-            },
-            "type": "array"
-          },
-          "provider": {
-            "type": "string"
-          },
-          "registryName": {
-            "type": [
-              "string",
-              "null"
-            ]
-          },
-          "slug": {
-            "type": "string"
-          },
-          "sourceCheckedAt": {
-            "anyOf": [
-              {
-                "format": "date",
-                "type": "string"
-              },
-              {
-                "format": "date-time",
-                "type": "string"
-              }
-            ]
-          },
-          "sourceType": {
-            "enum": [
-              "registry",
-              "provider"
-            ],
-            "type": "string"
-          },
-          "sourceUrl": {
-            "type": "string"
-          },
-          "tagline": {
-            "type": "string"
-          },
-          "tags": {
-            "items": {
-              "type": "string"
-            },
-            "type": "array"
-          },
-          "verification": {
-            "enum": [
-              "listed",
-              "documented",
-              "connection-tested"
-            ],
-            "type": "string"
-          },
-          "website": {
-            "type": "string"
-          }
-        },
-        "required": [
-          "id",
-          "slug",
-          "name",
-          "provider",
-          "tagline",
-          "description",
-          "website",
-          "docsUrl",
-          "category",
-          "tags",
-          "capabilities",
-          "protocols",
-          "auth",
-          "pricing",
-          "endpoint",
-          "registryName",
-          "sourceUrl",
-          "sourceType",
-          "sourceCheckedAt",
-          "verification",
-          "notes",
-          "featured",
-          "color"
-        ],
-        "type": "object"
-      }
-    },
-    "required": [
-      "service"
-    ],
-    "type": "object"
-  },
-  {
-    "additionalProperties": false,
-    "properties": {
-      "error": {
-        "additionalProperties": false,
-        "properties": {
-          "code": {
-            "minLength": 1,
-            "type": "string"
-          },
-          "message": {
-            "type": "string"
-          }
-        },
-        "required": [
-          "code",
-          "message"
-        ],
-        "type": "object"
-      },
-      "error_code": {
-        "minLength": 1,
-        "type": "string"
-      }
-    },
-    "required": [
-      "error_code",
-      "error"
-    ],
-    "type": "object"
-  }
-]New value: +[
+  {
+    "additionalProperties": false,
+    "properties": {
+      "service": {
+        "additionalProperties": false,
+        "properties": {
+          "auth": {
+            "enum": [
+              "api-key",
+              "oauth",
+              "wallet-payment",
+              "none",
+              "unknown"
+            ],
+            "type": "string"
+          },
+          "capabilities": {
+            "items": {
+              "type": "string"
+            },
+            "type": "array"
+          },
+          "category": {
+            "enum": [
+              "search",
+              "extraction",
+              "data",
+              "browser",
+              "documents"
+            ],
+            "type": "string"
+          },
+          "color": {
+            "type": "string"
+          },
+          "description": {
+            "type": "string"
+          },
+          "docsUrl": {
+            "type": "string"
+          },
+          "endpoint": {
+            "type": [
+              "string",
+              "null"
+            ]
+          },
+          "featured": {
+            "type": "boolean"
+          },
+          "id": {
+            "type": "string"
+          },
+          "name": {
+            "type": "string"
+          },
+          "notes": {
+            "type": "string"
+          },
+          "pricing": {
+            "additionalProperties": false,
+            "properties": {
+              "checkedAt": {
+                "anyOf": [
+                  {
+                    "anyOf": [
+                      {
+                        "format": "date",
+                        "type": "string"
+                      },
+                      {
+                        "format": "date-time",
+                        "type": "string"
+                      }
+                    ]
+                  },
+                  {
+                    "type": "null"
+                  }
+                ]
+              },
+              "model": {
+                "enum": [
+                  "free",
+                  "freemium",
+                  "usage-based",
+                  "subscription",
+                  "unknown"
+                ],
+                "type": "string"
+              },
+              "summary": {
+                "type": "string"
+              },
+              "url": {
+                "type": [
+                  "string",
+                  "null"
+                ]
+              }
+            },
+            "required": [
+              "model",
+              "summary",
+              "url",
+              "checkedAt"
+            ],
+            "type": "object"
+          },
+          "protocols": {
+            "items": {
+              "enum": [
+                "MCP",
+                "REST",
+                "x402"
+              ],
+              "type": "string"
+            },
+            "type": "array"
+          },
+          "provider": {
+            "type": "string"
+          },
+          "registryName": {
+            "type": [
+              "string",
+              "null"
+            ]
+          },
+          "slug": {
+            "type": "string"
+          },
+          "sourceCheckedAt": {
+            "anyOf": [
+              {
+                "format": "date",
+                "type": "string"
+              },
+              {
+                "format": "date-time",
+                "type": "string"
+              }
+            ]
+          },
+          "sourceType": {
+            "enum": [
+              "registry",
+              "provider"
+            ],
+            "type": "string"
+          },
+          "sourceUrl": {
+            "type": "string"
+          },
+          "tagline": {
+            "type": "string"
+          },
+          "tags": {
+            "items": {
+              "type": "string"
+            },
+            "type": "array"
+          },
+          "verification": {
+            "enum": [
+              "listed",
+              "documented",
+              "connection-tested"
+            ],
+            "type": "string"
+          },
+          "website": {
+            "type": "string"
+          }
+        },
+        "required": [
+          "id",
+          "slug",
+          "name",
+          "provider",
+          "tagline",
+          "description",
+          "website",
+          "docsUrl",
+          "category",
+          "tags",
+          "capabilities",
+          "protocols",
+          "auth",
+          "pricing",
+          "endpoint",
+          "registryName",
+          "sourceUrl",
+          "sourceType",
+          "sourceCheckedAt",
+          "verification",
+          "notes",
+          "featured",
+          "color"
+        ],
+        "type": "object"
+      }
+    },
+    "required": [
+      "service"
+    ],
+    "type": "object"
+  },
+  {
+    "additionalProperties": false,
+    "properties": {
+      "error": {
+        "additionalProperties": false,
+        "properties": {
+          "code": {
+            "minLength": 1,
+            "type": "string"
+          },
+          "message": {
+            "type": "string"
+          }
+        },
+        "required": [
+          "code",
+          "message"
+        ],
+        "type": "object"
+      },
+      "error_code": {
+        "minLength": 1,
+        "type": "string"
+      },
+      "recovery": {
+        "additionalProperties": false,
+        "properties": {
+          "automaticRetryAllowed": {
+            "const": false
+          },
+          "guidance": {
+            "type": "string"
+          },
+          "requiredArguments": {
+            "items": {
+              "type": "string"
+            },
+            "type": "array"
+          },
+          "tool": {
+            "type": "string"
+          }
+        },
+        "required": [
+          "tool",
+          "requiredArguments",
+          "guidance",
+          "automaticRetryAllowed"
+        ],
+        "type": "object"
+      }
+    },
+    "required": [
+      "error_code",
+      "error"
+    ],
+    "type": "object"
+  }
+]

Changed1 schema field changedOct 15, 2026

addedInput schema / properties / slug / description

Added value: +"Exact published service slug returned by search_services; do not pass a URL or display name."

Changed4 schema fields changedOct 15, 2026

removedOutput schema / additionalProperties
```
Removed value: -false
```

addedOutput schema / anyOf

Added value: +[
+  {
+    "additionalProperties": false,
+    "properties": {
+      "service": {
+        "additionalProperties": false,
+        "properties": {
+          "auth": {
+            "enum": [
+              "api-key",
+              "oauth",
+              "wallet-payment",
+              "none",
+              "unknown"
+            ],
+            "type": "string"
+          },
+          "capabilities": {
+            "items": {
+              "type": "string"
+            },
+            "type": "array"
+          },
+          "category": {
+            "enum": [
+              "search",
+              "extraction",
+              "data",
+              "browser",
+              "documents"
+            ],
+            "type": "string"
+          },
+          "color": {
+            "type": "string"
+          },
+          "description": {
+            "type": "string"
+          },
+          "docsUrl": {
+            "type": "string"
+          },
+          "endpoint": {
+            "type": [
+              "string",
+              "null"
+            ]
+          },
+          "featured": {
+            "type": "boolean"
+          },
+          "id": {
+            "type": "string"
+          },
+          "name": {
+            "type": "string"
+          },
+          "notes": {
+            "type": "string"
+          },
+          "pricing": {
+            "additionalProperties": false,
+            "properties": {
+              "checkedAt": {
+                "anyOf": [
+                  {
+                    "anyOf": [
+                      {
+                        "format": "date",
+                        "type": "string"
+                      },
+                      {
+                        "format": "date-time",
+                        "type": "string"
+                      }
+                    ]
+                  },
+                  {
+                    "type": "null"
+                  }
+                ]
+              },
+              "model": {
+                "enum": [
+                  "free",
+                  "freemium",
+                  "usage-based",
+                  "subscription",
+                  "unknown"
+                ],
+                "type": "string"
+              },
+              "summary": {
+                "type": "string"
+              },
+              "url": {
+                "type": [
+                  "string",
+                  "null"
+                ]
+              }
+            },
+            "required": [
+              "model",
+              "summary",
+              "url",
+              "checkedAt"
+            ],
+            "type": "object"
+          },
+          "protocols": {
+            "items": {
+              "enum": [
+                "MCP",
+                "REST",
+                "x402"
+              ],
+              "type": "string"
+            },
+            "type": "array"
+          },
+          "provider": {
+            "type": "string"
+          },
+          "registryName": {
+            "type": [
+              "string",
+              "null"
+            ]
+          },
+          "slug": {
+            "type": "string"
+          },
+          "sourceCheckedAt": {
+            "anyOf": [
+              {
+                "format": "date",
+                "type": "string"
+              },
+              {
+                "format": "date-time",
+                "type": "string"
+              }
+            ]
+          },
+          "sourceType": {
+            "enum": [
+              "registry",
+              "provider"
+            ],
+            "type": "string"
+          },
+          "sourceUrl": {
+            "type": "string"
+          },
+          "tagline": {
+            "type": "string"
+          },
+          "tags": {
+            "items": {
+              "type": "string"
+            },
+            "type": "array"
+          },
+          "verification": {
+            "enum": [
+              "listed",
+              "documented",
+              "connection-tested"
+            ],
+            "type": "string"
+          },
+          "website": {
+            "type": "string"
+          }
+        },
+        "required": [
+          "id",
+          "slug",
+          "name",
+          "provider",
+          "tagline",
+          "description",
+          "website",
+          "docsUrl",
+          "category",
+          "tags",
+          "capabilities",
+          "protocols",
+          "auth",
+          "pricing",
+          "endpoint",
+          "registryName",
+          "sourceUrl",
+          "sourceType",
+          "sourceCheckedAt",
+          "verification",
+          "notes",
+          "featured",
+          "color"
+        ],
+        "type": "object"
+      }
+    },
+    "required": [
+      "service"
+    ],
+    "type": "object"
+  },
+  {
+    "additionalProperties": false,
+    "properties": {
+      "error": {
+        "additionalProperties": false,
+        "properties": {
+          "code": {
+            "minLength": 1,
+            "type": "string"
+          },
+          "message": {
+            "type": "string"
+          }
+        },
+        "required": [
+          "code",
+          "message"
+        ],
+        "type": "object"
+      },
+      "error_code": {
+        "minLength": 1,
+        "type": "string"
+      }
+    },
+    "required": [
+      "error_code",
+      "error"
+    ],
+    "type": "object"
+  }
+]

removedOutput schema / properties

Removed value: -{
-  "service": {
-    "additionalProperties": false,
-    "properties": {
-      "auth": {
-        "enum": [
-          "api-key",
-          "oauth",
-          "none",
-          "unknown"
-        ],
-        "type": "string"
-      },
-      "capabilities": {
-        "items": {
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "category": {
-        "enum": [
-          "search",
-          "extraction",
-          "data",
-          "browser",
-          "documents"
-        ],
-        "type": "string"
-      },
-      "color": {
-        "type": "string"
-      },
-      "description": {
-        "type": "string"
-      },
-      "docsUrl": {
-        "type": "string"
-      },
-      "endpoint": {
-        "type": [
-          "string",
-          "null"
-        ]
-      },
-      "featured": {
-        "type": "boolean"
-      },
-      "id": {
-        "type": "string"
-      },
-      "name": {
-        "type": "string"
-      },
-      "notes": {
-        "type": "string"
-      },
-      "pricing": {
-        "additionalProperties": false,
-        "properties": {
-          "checkedAt": {
-            "anyOf": [
-              {
-                "anyOf": [
-                  {
-                    "format": "date",
-                    "type": "string"
-                  },
-                  {
-                    "format": "date-time",
-                    "type": "string"
-                  }
-                ]
-              },
-              {
-                "type": "null"
-              }
-            ]
-          },
-          "model": {
-            "enum": [
-              "free",
-              "freemium",
-              "usage-based",
-              "subscription",
-              "unknown"
-            ],
-            "type": "string"
-          },
-          "summary": {
-            "type": "string"
-          },
-          "url": {
-            "type": [
-              "string",
-              "null"
-            ]
-          }
-        },
-        "required": [
-          "model",
-          "summary",
-          "url",
-          "checkedAt"
-        ],
-        "type": "object"
-      },
-      "protocols": {
-        "items": {
-          "enum": [
-            "MCP",
-            "REST",
-            "x402"
-          ],
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "provider": {
-        "type": "string"
-      },
-      "registryName": {
-        "type": [
-          "string",
-          "null"
-        ]
-      },
-      "slug": {
-        "type": "string"
-      },
-      "sourceCheckedAt": {
-        "anyOf": [
-          {
-            "format": "date",
-            "type": "string"
-          },
-          {
-            "format": "date-time",
-            "type": "string"
-          }
-        ]
-      },
-      "sourceType": {
-        "enum": [
-          "registry",
-          "provider"
-        ],
-        "type": "string"
-      },
-      "sourceUrl": {
-        "type": "string"
-      },
-      "tagline": {
-        "type": "string"
-      },
-      "tags": {
-        "items": {
-          "type": "string"
-        },
-        "type": "array"
-      },
-      "verification": {
-        "enum": [
-          "listed",
-          "documented",
-          "connection-tested"
-        ],
-        "type": "string"
-      },
-      "website": {
-        "type": "string"
-      }
-    },
-    "required": [
-      "id",
-      "slug",
-      "name",
-      "provider",
-      "tagline",
-      "description",
-      "website",
-      "docsUrl",
-      "category",
-      "tags",
-      "capabilities",
-      "protocols",
-      "auth",
-      "pricing",
-      "endpoint",
-      "registryName",
-      "sourceUrl",
-      "sourceType",
-      "sourceCheckedAt",
-      "verification",
-      "notes",
-      "featured",
-      "color"
-    ],
-    "type": "object"
-  }
-}

removedOutput schema / required
```
Removed value: -[
-  "service"
-]
```

First observedOct 12, 2026

TDQS

A4/5.0

Behavior4/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already declare read-only, idempotent, non-destructive, and closed-world behavior, so the description does not need to restate safety. It adds useful context about what the entry contains and that no provider connection occurs, which goes beyond the structured annotations.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is two tight sentences with no wasted wording. It front-loads the core action and follows with the important non-connection caveat.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a simple one-parameter read tool with an output schema and rich annotations, the description is largely complete: it says what the entry includes and explicitly rules out provider connection. It could be slightly stronger by linking its use to search_services or contrasting it with evidence/connection siblings, but no critical calling information is missing.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100%, and the slug parameter is already well documented in the schema as the exact published service slug from search_services. The description does not add parameter-specific meaning beyond what the schema provides, so the baseline of 3 is appropriate.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description gives a specific verb and resource: 'Read one full catalogue entry,' and clarifies that it returns documentation links, pricing caveats, and source check date. It also distinguishes itself from provider-connection tools by saying it 'Does not connect to the provider,' though it does not explicitly name sibling tools like get_service_evidence or get_connection_spec.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Usage is clear: it is for reading a single catalogue entry, and the slug schema indicates it should follow search_services. The exclusion 'Does not connect to the provider' helps route agents away from connection tools, but alternatives are not explicitly named or compared.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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