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Search llms registry

search_llms_registry
Read-onlyIdempotent

Search domains and indexed documentation links by development task. Text relevance ranks before authority and ownership verification. Compact results omit owner claims by default; use detail=full for profile metadata.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
pageNo
queryYesSearch terms, e.g. "payments api docs".
detailNoCompact consumer fields by default; full adds owner profile, claims and listing metadata.compact
categoryNoFilter by inferred topic ID from list_categories. Topics describe publisher metadata, not capabilities or correctness.
per_pageNo
capabilityNoFilter to sites explicitly publishing an MCP endpoint link. Publisher declaration alone does not prove availability.
verified_onlyNoOnly domains whose owner has verified them.
include_unlistedNoAlso return low-authority (unlisted) entries.

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed8 schema fields changed
    • addedInput schema / properties / capability
      Added value: +{
      +  "description": "Filter to sites explicitly publishing an MCP endpoint link. Publisher declaration alone does not prove availability.",
      +  "enum": [
      +    "mcp"
      +  ],
      +  "type": "string"
      +}
    • addedInput schema / properties / category
      Added value: +{
      +  "description": "Filter by inferred topic ID from list_categories. Topics describe publisher metadata, not capabilities or correctness.",
      +  "enum": [
      +    "ai-ml",
      +    "developer-tools",
      +    "infrastructure",
      +    "data-analytics",
      +    "cybersecurity",
      +    "finance-payments",
      +    "ecommerce",
      +    "productivity",
      +    "marketing",
      +    "education",
      +    "healthcare",
      +    "media",
      +    "design",
      +    "gaming",
      +    "travel",
      +    "community",
      +    "legal",
      +    "recruiting-careers",
      +    "industrial-manufacturing",
      +    "real-estate",
      +    "arts-culture",
      +    "sports-fitness",
      +    "food-dining",
      +    "automotive",
      +    "government-public-services",
      +    "science-research"
      +  ],
      +  "type": "string"
      +}
    • addedInput schema / properties / detail
      Added value: +{
      +  "default": "compact",
      +  "description": "Compact consumer fields by default; full adds owner profile, claims and listing metadata.",
      +  "enum": [
      +    "compact",
      +    "full"
      +  ],
      +  "type": "string"
      +}
    • changedInput schema / properties / per_page / default
      Previous value: -50New value: +10
    • addedInput schema / properties / query / maxLength
      Added value: +200
    • addedInput schema / properties / query / minLength
      Added value: +1
    • addedInput schema / properties / query / pattern
      Added value: +"\\S"
    • changedOutput schema / (root)
      Previous value: -nullNew value: +{
      +  "anyOf": [
      +    {
      +      "additionalProperties": false,
      +      "properties": {
      +        "page": {
      +          "type": "integer"
      +        },
      +        "per_page": {
      +          "type": "integer"
      +        },
      +        "query": {
      +          "type": "string"
      +        },
      +        "results": {
      +          "items": {
      +            "additionalProperties": false,
      +            "properties": {
      +              "agent_terms": {
      +                "anyOf": [
      +                  {
      +                    "additionalProperties": false,
      +                    "properties": {
      +                      "attribution": {
      +                        "enum": [
      +                          "required",
      +                          "appreciated",
      +                          "none"
      +                        ],
      +                        "type": "string"
      +                      },
      +                      "attribution_text": {
      +                        "maxLength": 200,
      +                        "type": "string"
      +                      },
      +                      "automated_access": {
      +                        "enum": [
      +                          "welcome",
      +                          "limited",
      +                          "ask",
      +                          "not_allowed"
      +                        ],
      +                        "type": "string"
      +                      },
      +                      "notes": {
      +                        "maxLength": 500,
      +                        "type": "string"
      +                      },
      +                      "pricing": {
      +                        "enum": [
      +                          "free",
      +                          "freemium",
      +                          "paid"
      +                        ],
      +                        "type": "string"
      +                      },
      +                      "pricing_url": {
      +                        "type": "string"
      +                      },
      +                      "rate_limit": {
      +                        "maxLength": 100,
      +                        "type": "string"
      +                      },
      +                      "terms_url": {
      +                        "type": "string"
      +                      }
      +                    },
      +                    "required": [],
      +                    "type": "object"
      +                  },
      +                  {
      +                    "type": "null"
      +                  }
      +                ]
      +              },
      +              "authority": {
      +                "type": [
      +                  "integer",
      +                  "null"
      +                ]
      +              },
      +              "badge": {
      +                "type": "string"
      +              },
      +              "capabilities": {
      +                "description": "Publisher-declared capabilities. An MCP declaration does not prove availability or protocol compatibility.",
      +                "items": {
      +                  "enum": [
      +                    "mcp"
      +                  ],
      +                  "type": "string"
      +                },
      +                "type": "array",
      +                "uniqueItems": true
      +              },
      +              "capability_evidence": {
      +                "items": {
      +                  "additionalProperties": false,
      +                  "properties": {
      +                    "id": {
      +                      "const": "mcp"
      +                    },
      +                    "source_url": {
      +                      "type": "string"
      +                    },
      +                    "status": {
      +                      "const": "publisher_declared"
      +                    },
      +                    "url": {
      +                      "type": "string"
      +                    }
      +                  },
      +                  "required": [
      +                    "id",
      +                    "url",
      +                    "source_url",
      +                    "status"
      +                  ],
      +                  "type": "object"
      +                },
      +                "type": "array"
      +              },
      +              "categories": {
      +                "description": "Inferred topic IDs from publisher metadata; empty means unclassified.",
      +                "items": {
      +                  "enum": [
      +                    "ai-ml",
      +                    "developer-tools",
      +                    "infrastructure",
      +                    "data-analytics",
      +                    "cybersecurity",
      +                    "finance-payments",
      +                    "ecommerce",
      +                    "productivity",
      +                    "marketing",
      +                    "education",
      +                    "healthcare",
      +                    "media",
      +                    "design",
      +                    "gaming",
      +                    "travel",
      +                    "community",
      +                    "legal",
      +                    "recruiting-careers",
      +                    "industrial-manufacturing",
      +                    "real-estate",
      +                    "arts-culture",
      +                    "sports-fitness",
      +                    "food-dining",
      +                    "automotive",
      +                    "government-public-services",
      +                    "science-research"
      +                  ],
      +                  "type": "string"
      +                },
      +                "maxItems": 5,
      +                "type": "array",
      +                "uniqueItems": true
      +              },
      +              "categorized_at": {
      +                "type": [
      +                  "string",
      +                  "null"
      +                ]
      +              },
      +              "category_evidence": {
      +                "items": {
      +                  "additionalProperties": false,
      +                  "properties": {
      +                    "confidence": {
      +                      "description": "Deterministic rule strength, not a calibrated probability.",
      +                      "maximum": 1,
      +                      "minimum": 0,
      +                      "type": "number"
      +                    },
      +                    "evidence": {
      +                      "items": {
      +                        "type": "string"
      +                      },
      +                      "type": "array"
      +                    },
      +                    "id": {
      +                      "enum": [
      +                        "ai-ml",
      +                        "developer-tools",
      +                        "infrastructure",
      +                        "data-analytics",
      +                        "cybersecurity",
      +                        "finance-payments",
      +                        "ecommerce",
      +                        "productivity",
      +                        "marketing",
      +                        "education",
      +                        "healthcare",
      +                        "media",
      +                        "design",
      +                        "gaming",
      +                        "travel",
      +                        "community",
      +                        "legal",
      +                        "recruiting-careers",
      +                        "industrial-manufacturing",
      +                        "real-estate",
      +                        "arts-culture",
      +                        "sports-fitness",
      +                        "food-dining",
      +                        "automotive",
      +                        "government-public-services",
      +                        "science-research"
      +                      ],
      +                      "type": "string"
      +                    },
      +                    "source": {
      +                      "const": "publisher_metadata"
      +                    }
      +                  },
      +                  "required": [
      +                    "id",
      +                    "confidence",
      +                    "evidence",
      +                    "source"
      +                  ],
      +                  "type": "object"
      +                },
      +                "type": "array"
      +              },
      +              "category_version": {
      +                "type": [
      +                  "string",
      +                  "null"
      +                ]
      +              },
      +              "claim": {
      +                "additionalProperties": false,
      +                "properties": {
      +                  "benefits": {
      +                    "items": {
      +                      "type": "string"
      +                    },
      +                    "type": "array"
      +                  },
      +                  "docs": {
      +                    "type": "string"
      +                  },
      +                  "hint": {
      +                    "type": "string"
      +                  },
      +                  "mcp": {
      +                    "type": "string"
      +                  },
      +                  "verification": {
      +                    "type": "string"
      +                  },
      +                  "verify": {
      +                    "type": "string"
      +                  }
      +                },
      +                "required": [
      +                  "hint",
      +                  "verification",
      +                  "verify",
      +                  "docs",
      +                  "mcp",
      +                  "benefits"
      +                ],
      +                "type": "object"
      +              },
      +              "contact": {
      +                "type": [
      +                  "string",
      +                  "null"
      +                ]
      +              },
      +              "country": {
      +                "type": [
      +                  "string",
      +                  "null"
      +                ]
      +              },
      +              "description": {
      +                "type": [
      +                  "string",
      +                  "null"
      +                ]
      +              },
      +              "domain": {
      +                "type": "string"
      +              },
      +              "evidence": {
      +                "items": {
      +                  "additionalProperties": true,
      +                  "properties": {
      +                    "excerpt": {
      +                      "type": [
      +                        "string",
      +                        "null"
      +                      ]
      +                    },
      +                    "source_url": {
      +                      "type": [
      +                        "string",
      +                        "null"
      +                      ]
      +                    },
      +                    "title": {
      +                      "type": [
      +                        "string",
      +                        "null"
      +                      ]
      +                    },
      +                    "url": {
      +                      "type": "string"
      +                    }
      +                  },
      +                  "required": [
      +                    "url"
      +                  ],
      +                  "type": "object"
      +                },
      +                "type": "array"
      +              },
      +              "first_seen": {
      +                "type": [
      +                  "string",
      +                  "null"
      +                ]
      +              },
      +              "last_checked": {
      +                "type": [
      +                  "string",
      +                  "null"
      +                ]
      +              },
      +              "links": {
      +                "type": [
      +                  "integer",
      +                  "null"
      +                ]
      +              },
      +              "llms_full_txt": {
      +                "type": [
      +                  "string",
      +                  "null"
      +                ]
      +              },
      +              "llms_txt": {
      +                "type": [
      +                  "string",
      +                  "null"
      +                ]
      +              },
      +              "match_score": {
      +                "type": "number"
      +              },
      +              "nested_llms_txt": {
      +                "items": {
      +                  "type": "string"
      +                },
      +                "type": "array"
      +              },
      +              "rank": {
      +                "type": [
      +                  "integer",
      +                  "null"
      +                ]
      +              },
      +              "registered_at": {
      +                "type": [
      +                  "string",
      +                  "null"
      +                ]
      +              },
      +              "sections": {
      +                "type": [
      +                  "integer",
      +                  "null"
      +                ]
      +              },
      +              "status": {
      +                "enum": [
      +                  "pending",
      +                  "valid",
      +                  "invalid",
      +                  "unreachable"
      +                ],
      +                "type": "string"
      +              },
      +              "summary": {
      +                "type": [
      +                  "string",
      +                  "null"
      +                ]
      +              },
      +              "tags": {
      +                "items": {
      +                  "type": "string"
      +                },
      +                "type": "array"
      +              },
      +              "tier": {
      +                "enum": [
      +                  "featured",
      +                  "listed",
      +                  "unlisted",
      +                  "rejected",
      +                  null
      +                ],
      +                "type": [
      +                  "string",
      +                  "null"
      +                ]
      +              },
      +              "title": {
      +                "type": [
      +                  "string",
      +                  "null"
      +                ]
      +              },
      +              "verified": {
      +                "type": "boolean"
      +              },
      +              "verified_at": {
      +                "type": [
      +                  "string",
      +                  "null"
      +                ]
      +              },
      +              "why": {
      +                "items": {
      +                  "type": "string"
      +                },
      +                "type": "array"
      +              }
      +            },
      +            "required": [
      +              "domain",
      +              "status",
      +              "tier",
      +              "authority",
      +              "verified",
      +              "title",
      +              "summary",
      +              "llms_txt",
      +              "llms_full_txt",
      +              "last_checked",
      +              "agent_terms",
      +              "categories",
      +              "capabilities"
      +            ],
      +            "type": "object"
      +          },
      +          "type": "array"
      +        },
      +        "total": {
      +          "type": "integer"
      +        }
      +      },
      +      "required": [
      +        "page",
      +        "per_page",
      +        "total",
      +        "results"
      +      ],
      +      "type": "object"
      +    },
      +    {
      +      "additionalProperties": true,
      +      "properties": {
      +        "detail": {
      +          "type": "string"
      +        },
      +        "domain": {
      +          "type": "string"
      +        },
      +        "error": {
      +          "type": "string"
      +        },
      +        "hint": {
      +          "type": "string"
      +        },
      +        "retry_after_seconds": {
      +          "type": "integer"
      +        }
      +      },
      +      "required": [
      +        "error"
      +      ],
      +      "type": "object"
      +    }
      +  ],
      +  "type": "object"
      +}
  2. First observed

TDQS

A3.7/5.0
Behavior4/5

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

Annotations already declare this a safe idempotent read (readOnlyHint=true, destructiveHint=false). The description goes further by disclosing ranking behavior ('Text relevance ranks before authority and ownership verification') and the default compaction of results ('Compact results omit owner claims by default'). That is meaningful behavior beyond the annotations.

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

Conciseness4/5

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

Three tight sentences with the core purpose front-loaded. Each sentence carries distinct information (scope, ranking behavior, default compaction). Minor restatement of schema content, but no padding.

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?

An output schema exists, so return values need not be explained. The description covers the key defaults (compact mode) and the surprising ranking order. It is largely complete, though it stops short of routing the agent among the many sibling read tools.

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 description coverage is 75%, so most parameters are documented in the schema itself. The description restates the detail=compact/full distinction that the schema already covers, adding no new syntax or format guidance. Baseline 3 is appropriate given the schema carries the weight.

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?

States a specific verb and resource: 'Search domains and indexed documentation links by development task.' This is clearly distinguishable from write-oriented siblings like register_domain and verify_domain, but it does not explicitly differentiate itself from adjacent read tools such as list_domains or lookup_domain.

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

Usage Guidelines3/5

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

The description hints at usage via 'use detail=full for profile metadata' and explains the ranking order, but there is no explicit statement of when to reach for this tool versus list_domains, lookup_domain, or resolve in the sibling set. Usage must be inferred.

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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