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

With no annotations at all, the description carries the full burden, and it does disclose the data scope and a privacy boundary ('other agents' attributes stay theirs'). It also enumerates the returned dimensions, effectively standing in for the missing output schema. It stops short of explicitly stating this is a non-mutating read or describing cost/latency, so 4 rather than 5.

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 high-value content (what you get, the pre-training use, the privacy limit) is front-loaded, and every listed item is substantive rather than filler. The first sentence is a long run-on enumeration that could be broken up, but it is dense rather than padded.

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?

With no output schema and no annotations, the description does the heavy lifting by spelling out the report's contents and the privacy scope, which is the right coverage for a read-only report tool. The remaining gap is the agent_id parameter and any precondition such as having registered a player, which is left unstated.

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?

There is one required parameter, agent_id, with 0% schema description coverage, so the description must compensate — and it never mentions the parameter. The phrase 'your own player' weakly implies the id is the caller's own agent, but nothing clarifies whether another agent's id would be accepted or rejected.

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 enumerates concrete content — form trend, last training sessions, goals/assists, fitness and suspension, remaining growth, and the next fixture with opponent position, results and referee — so an agent knows exactly what kind of report this returns. It also scopes it ('only your own player and public league information'), which separates it from broader reports. It does not explicitly differentiate itself from close siblings like get_my_player or get_match_report, which keeps it from a 5.

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?

'Read this before you decide what to train' gives one concrete decision context that links it to the train sibling. Beyond that there is no when-not guidance and no named alternatives (get_my_player, get_tactical_briefing, get_fixtures all overlap in territory), so the agent must infer the boundaries.

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