CTFtime MCP Server

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It mentions that the tool retrieves a 'ranked list' but does not specify ranking criteria (e.g., by points, wins), data freshness, rate limits, authentication needs, or error handling. For a tool with no annotation coverage, this leaves significant behavioral gaps.

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

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

The description is efficiently structured with a clear purpose statement followed by labeled sections for Args and Returns. Each sentence adds value without redundancy, and the information is front-loaded, making it easy to parse quickly. No wasted words or unnecessary details are present.

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

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

Given the tool's moderate complexity (2 parameters, no annotations, but with an output schema), the description is reasonably complete. It covers the purpose, parameters, and return type adequately. However, it lacks details on behavioral aspects like ranking methodology or error conditions, which would enhance completeness despite the presence of an output schema.

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

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

Schema description coverage is 0%, so the description must compensate. It adds meaningful semantics: 'country_code' is explained as an ISO 3166-1 alpha-2 code with examples ('US', 'DE', 'CN'), and 'limit' is clarified as the maximum number of teams with a default of 10. This provides essential context beyond the bare schema, though it doesn't cover all potential edge cases.

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

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

The description clearly states the verb 'Retrieve' and the resource 'top CTF teams from a specific country', making the purpose explicit. It distinguishes from sibling tools like 'get_top_teams' (which presumably lacks country filtering) and 'get_team_info' (which likely retrieves details for a specific team), establishing clear differentiation.

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

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

The description implies usage when needing top teams filtered by country, but does not explicitly state when to use this tool versus alternatives like 'get_top_teams' (without country filter) or 'get_team_info' (for specific team details). No exclusions or prerequisites are mentioned, leaving usage context somewhat inferred rather than clearly defined.

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