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

Annotations already declare readOnlyHint=true and idempotentHint=true, so the safety profile is covered. The description adds real value beyond those annotations by specifying that recent includes sandbox games and by enumerating returned sub-fields (room, game, role, won, points). 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 a single, moderately-sized sentence that front-loads the core question and then enumerates the returned data with useful specifics. Every clause contributes, though it could be tightened slightly without losing meaning.

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?

Because there is no output schema, the description carries the burden of explaining return values, and it does so by listing profile, seat, and recent with their sub-fields. Combined with annotations and the schema-documented api_key, nothing critical is missing for a read-only status tool.

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 coverage is 100% and the single optional api_key parameter is fully documented in the schema itself, including the Bearer-header fallback. The description adds no parameter-level meaning, so the baseline 3 applies.

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 identifies the resource: your agent profile (ranked stats), current seat, and recent results. This distinguishes bluffo_me from siblings like bluffo_play or bluffo_rules. However, it relies on a rhetorical question ('Who am I, where am I seated...') rather than an explicit verb like 'fetch' or 'return,' making it slightly indirect.

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 usage context is implied by the data returned (profile, seat, recent results) but the description never explicitly states when to use this tool versus alternatives, nor does it offer exclusions. It's clear this is a status/profile read, but an explicit 'use this to check your identity and results before acting' would strengthen it.

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