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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the safety profile is covered. The description adds only the ID namespace; it says nothing about behavior when the id is unknown (error vs. empty result) and nothing about lookup cost, which is the remaining open question for a lookup tool.

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?

A single front-loaded sentence with zero wasted words and the key qualifier (the id namespace) placed where it is read first. The terseness borders on under-specification for a tool with an undocumented parameter, but nothing in the sentence itself is redundant.

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 tool is simple (one required integer parameter) and an output schema plus rich annotations exist, so the description needn't explain return values or safety. The gap is the identifier: with 0% schema coverage and no pointer to where a Vosters Rosters id comes from, the agent is left to guess at acquisition and format.

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 schema gives only 'player_id: integer' with no meaning. The description partially compensates by naming the identifier system (Vosters Rosters id), which tells the agent not to pass an arbitrary or external id, but it gives no format, range, or how to obtain a valid id.

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?

States a specific verb and resource (get a football player profile) plus the identifier namespace (Vosters Rosters id), which contrasts with the search-style siblings. It does not, however, clarify how it differs from the similarly named get_player sibling, so an agent could still hesitate between the two.

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?

Usage is only implied: the phrase 'by Vosters Rosters id' signals that a known identifier is required, so search_football_players is the natural precursor. There is no explicit when-to-use, when-not-to-use, or named alternative, so the agent must infer the retrieval path.

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