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

With no annotations, the description carries the full behavioral burden. It does disclose one useful trait — that the -4 hit cost is factored into recommendations — and that availability_alerts should be surfaced. But it says nothing about whether the call is read-only, what external team state it reads, or how results are shaped.

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 dense sentence with no filler, and the core action is front-loaded. The trailing 'mention any availability_alerts to the user' is a useful instruction rather than padding.

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?

For a four-parameter tool with no annotations, no output schema, and zero schema description coverage, one sentence is not enough. It omits what the recommendation returns, how max_transfers and free_transfers alter output, and how the -4 hit rule interacts with the parameters.

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, and it only partially does: 'N gameweeks' maps loosely to the gameweeks parameter. team_id, max_transfers, and free_transfers receive no explanation, and the hit-cost reference is not tied to free_transfers explicitly.

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 names the resource ('transfers') and a specific constraint (next N gameweeks, after -4 hits), which gives the agent a decent sense that this is a recommendation tool. However, it never distinguishes itself from the other recommendation-shaped siblings such as optimal_squad, chip_advice, or compare_players, leaving the agent to infer the boundary.

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?

There is no explicit when-to-use guidance and no named alternatives. The mention of 'after -4 hits' hints at a decision context, but the agent is not told when this tool should be preferred over optimal_squad or predict_points.

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