compare_players

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

With no annotations, the description bears full responsibility for behavioral disclosure. It does not state whether the tool is read-only, requires authentication, or has side effects. The description focuses on parameter details and returns a vague 'detailed comparison', omitting important behavioral traits like data source or potential error conditions.

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 concise, with a brief purpose statement followed by a bullet list of parameters and a returns line. It front-loads the main action and avoids redundant information. Could be slightly tighter, but overall efficient.

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 has 5 parameters, no output schema, and no annotations, the description covers parameter explanations adequately but lacks behavioral details and a clear description of the return format. The 'Detailed comparison' phrase is vague, and no example or structure is provided. Completeness is average, meeting minimum standards but with notable gaps.

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?

Despite 0% schema description coverage, the description adds meaningful context for all five parameters: it clarifies 'player_names' is a list (2-5 recommended), defines default metrics, explains boolean flags, and specifies a default for 'num_gameweeks'. This compensates well for the schema's lack of descriptions.

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 tool compares multiple players across metrics, with specific verb 'compare' and resource 'players'. It distinguishes from sibling tools like 'analyze_players' (likely single-player analysis) and 'get_player_information' (single player info), and adds a recommended range of 2-5 players, reinforcing its purpose.

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 lacks explicit guidance on when to use this tool versus alternatives like 'analyze_players' or 'get_player_information'. It only implies usage for comparing multiple players and provides a player count suggestion, but no exclusions or context about when not to use it.

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