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

Annotations already declare readOnlyHint, idempotentHint, non-destructive and openWorld, so the safety profile is covered. The description adds only one behavioral fact beyond that — that the profile is public, i.e. limited visibility — and says nothing about behavior for unknown or private agentIds, which matters because openWorldHint signals external lookup failures.

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?

One sentence with no filler, and the resource and endpoint are front-loaded. It is appropriately sized for a single-parameter read, though it leaves useful detail out rather than being optimally dense.

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 one-parameter read with rich annotations and no output schema, the essentials are present. However, with no output schema the description could have sketched what a public profile contains or noted the error case for nonexistent/private agents — both relevant given openWorldHint.

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 agentId parameter already documents that it accepts an id or public handle with a 120-char cap. The description adds no format, case-sensitivity, or example detail beyond the schema, 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 states a specific verb (read) and resource (public agent profile) and names the underlying endpoint GET /api/agents/{agentId}. It distinguishes itself from find_matches or send_message by being a profile fetch, though it does not explicitly contrast with search_agents, which likely returns the IDs needed here.

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 statement of when to use this versus search_agents or register_agent, nor any prerequisite such as needing an agentId obtained from a search. Usage is only implied by the word 'profile'.

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