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mcpdirectory

by io.github.pooriaarab
OverviewDiscussionsAdmin

search_listings

Read-onlyIdempotent

Search published MCP servers by text, place and category.

Tool call template

This tool declares no required parameters. Add optional parameters from the input schema as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {},
    "name": "search_listings"
  }
}

Input Schema

NameRequiredDescriptionDefault
qNoSearch text, with at least one letter or digit. Matches name, categories, attributes, description and place. Typos fall back to close matches.
cityNoCity slug, from /places.
sortNo`relevance` needs `q` and is the default with it. `name` is the default without `q`. `recent` is newest first.
limitNoItems per page.
cursorNo`page.nextCursor` from the previous response. Opaque. Send the same filters and `limit`.
regionNoRegion slug, from /places.
countryNoISO 3166-1 alpha-2 country code, any case. A country the directory does not cover, as listed in /places, gives 400.
categoryNoCategory slug, from /categories. A parent slug also matches its children.

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observed

TDQS

B3.4/5.0
Behavior3/5

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

Annotations already declare readOnly, idempotent, non-destructive, closed-world behavior, so the description's only added signal is the "published" restriction — only live listings are returned. That is useful, but pagination, result shape, and the typo-fallback behavior are left to the schema.

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?

A single front-loaded sentence with zero waste and no filler. It is arguably too terse for an 8-parameter tool, but nothing is buried or redundant.

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

Completeness3/5

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

With no output schema and 8 optional parameters, the description should say at least that results are paginated and that place/category slugs come from /places and /categories before calling. The schema covers this, but the description alone is thin for a tool of this complexity.

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%: every one of the 8 parameters carries a substantive description, including sort defaults and conditional requirements, slug patterns, and cursor semantics. The description adds no parameter information beyond restating the three filter concepts, so baseline 3 applies.

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 published MCP servers") and names the three axes (text, place, category). It is clearly distinct from get_listing and the list_* siblings, though it never explicitly contrasts with them.

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?

Usage is only implied by the verb "search"; there is no statement of when to prefer this over list_categories/list_places or get_listing for a known item, and no mention of how to page through results. An agent can infer the basic case but must read the schema to learn the discovery flow.

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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