Crawlora MCP

chesscom_player_matches

Read-only

Get a player’s team-match records. The service calls Chess.com’s documented Published-Data API serially. This independent service is not affiliated with Chess.com; do not use results for AI training or dataset creation.

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "username": "<username>"
    },
    "name": "chesscom_player_matches"
  }
}

Input Schema

Name	Required	Description	Default
`username`	Yes	Required source username.

Output Schema

Name	Required	Description	Default
`data`	Yes	The tool result payload (shape varies per tool; see each tool's docs resource).

Schema Changelog

Changes observed during successful MCP inspections.

AddedNov 13, 2026

TDQS

B3.2/5.0

Behavior3/5

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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety profile is covered. The description adds useful context: the service calls the Chess.com API serially (implying potential latency) and carries legal restrictions against AI training/dataset creation. It does not disclose rate limits, pagination, or failure behavior, so it goes beyond annotations but not richly.

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 sentences, front-loaded with the purpose. The second and third sentences add implementation and legal context without excessive verbosity. The legal disclaimer could be seen as boilerplate for tool selection, but it is a constraint worth stating.

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?

The tool is simple (one parameter, output schema exists), and the description covers purpose, implementation caveat, and legal restriction. It lacks sibling differentiation, which is a notable gap for an agent choosing among many chesscom_* match-related tools, but the output schema means return values need not be explained.

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 100% for the single 'username' parameter, and the schema already documents it as 'Required source username.' The description adds no 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?

States a specific verb and resource: 'Get a player’s team-match records.' Clearly identifies the subject as a player's team-match records, which is narrower than generic games or tournaments. However, it does not explicitly differentiate from sibling tools like chesscom_club_matches or chesscom_match, leaving some ambiguity about scope.

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

Usage Guidelines2/5

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

Provides no guidance on when to use this tool versus alternatives such as chesscom_player_games or chesscom_club_matches. There are no exclusions, prerequisites, or context cues beyond the bare purpose statement.

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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