fpl_compare_managers

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

Annotations already indicate readOnlyHint=true, destructiveHint=false, idempotentHint=true, openWorldHint=true. The description adds behavioral context beyond annotations by detailing what the comparison shows (differences, common players, differentials) and error handling. No contradiction with annotations.

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 well-structured with clear sections (purpose, args, returns, examples, error handling). It is front-loaded with the main purpose. However, the 'Args' section is somewhat redundant with the schema, making it slightly verbose but not excessive.

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?

The description covers the tool's functionality, parameters with examples, and error handling. Although the output schema exists (not shown), the description provides a high-level return type. The description is adequate for the tool's complexity, though output format could be more detailed.

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 descriptions already cover all parameters (manager_names, league_id, gameweek) with clear text. The description's 'Args' section mostly repeats this information, adding minimal additional meaning. Given schema coverage is effectively 100%, baseline is 3.

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 managers' teams for a specific gameweek side-by-side and lists specific outputs (player selection, captaincy, points, common players, differentials). This distinguishes it from sibling tools like fpl_compare_players or fpl_get_manager_gameweek_team.

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 mentions 'useful for mini-league rivalry analysis and understanding what sets top managers apart' but does not explicitly state when not to use or provide alternatives. The guidance is implied but not explicit, missing a clear exclusion or comparison to related tools.

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