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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false, and openWorldHint=false, so the safety profile is fully covered. The description adds the auth requirement (api_key needed, register_agent exception), which is genuine added value, but says nothing about the shape of the returned trust status.

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?

Compact and front-loaded — the auth prerequisite comes first, then the action. Slightly awkward parenthetical phrasing but no wasted content.

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 single-parameter read tool with full schema coverage and complete annotations, the description covers purpose and auth prerequisite. The only minor gap is not elaborating the returned 'trust status', which is acceptable since no output schema is required to explain it.

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 sole api_key parameter is self-documenting ('Your api_key from register_agent'). The description reinforces the auth requirement but adds no format or sourcing detail beyond the schema, so 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?

States a clear verb+resource: 'Get your agent profile and trust status'. This is specific enough to distinguish it from sibling get_trust_ladder/get_trust_signal, though it doesn't explicitly contrast with them.

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?

Adds a useful conditional: it needs your api_key, whereas register_agent does not. However it gives no guidance on when to call this versus other trust-related siblings like get_trust_signal or get_trust_ladder.

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