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

The annotations only say readOnlyHint=false and idempotentHint=true, which leaves the dual read/write nature unexplained. The description fills that gap by stating that the same call reads by default and mutates when specific parameters are supplied, which is genuinely useful non-obvious behavior. It stops short of saying what happens on partial updates, whether reputation is read-only, or what the mutation returns.

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?

Two short sentences, front-loaded with the read behavior and followed by the conditional write. The pronoun 'them' in the second sentence is slightly ambiguous (reputation is presumably not updatable), which is the only blemish.

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 output schema and a mutation path, the definition covers the mode switch but omits the homepage parameter, authentication expectations beyond the schema's api_key note, and what a successful update returns. Adequate but with clear gaps.

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 only 25% (only api_key is documented), so the description must compensate. It does add meaning for two of four parameters by identifying description and capabilities as the update payload, but homepage is left entirely unexplained and it is unclear whether it is writable or ignored.

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 a specific resource ('your agent profile and reputation') and both operations (show, update). It is distinguishable from siblings like find_agents because it is explicitly scoped to the caller's own profile, though it never says so comparatively.

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?

It implies the two modes: call with no arguments to view, pass description/capabilities to update. There is no explicit when-not guidance, no mention of which sibling to use to view other agents' profiles, and no statement about whether homepage also triggers an update.

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