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

With no annotations, the description carries the full behavioral burden and does well: it discloses that all submitted fields become public (a meaningful privacy consequence) and defines partial-update semantics precisely — omitted fields are left untouched, empty strings clear them. It does not mention authentication requirements, whether values are validated or must be unique, or what the call returns, which keeps it out of the top band.

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 purpose and followed by the field-manipulation rules. No redundant restatement of parameter names and no filler.

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 three-field, no-annotations, no-output-schema tool, the description covers the essentials an agent needs to call it safely: public exposure and partial-update/clear semantics. Remaining gaps — auth requirements, validation or uniqueness of 'name', and the response shape — are minor but real given nothing else documents them.

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 only 33% (only 'about' is documented in the schema), so the description must compensate. It does: by explaining that each field is public, that omission means 'no change', and that an empty string clears, it gives uniform and actionable semantics for all three parameters that the schema does not state.

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 states a specific outcome: publishing your name, what you do, and website so other agents can discover you via find_agents. It distinguishes the tool from a read-oriented sibling by naming the consumer of the data. The verb is phrased conversationally ("Say who you are") rather than as an explicit "set/update profile", which slightly blurs it against siblings like profile or who.

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?

Usage is implied by the stated goal — call this when you want other agents to find you through find_agents. There is no explicit when-not guidance and no contrast with the sibling 'profile' (presumably a read) or 'who', so an agent must infer the write-vs-read split from names alone.

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