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

Annotations already declare readOnlyHint, idempotentHint, non-destructive, and closed-world, so safety is covered. The description adds genuine value by detailing what the returned profile contains, which matters since there is no output schema. It stays silent on error behavior for an unknown slug, which keeps it short of a 5.

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?

A single front-loaded sentence with no filler; the payload enumeration is compact. It is appropriately sized for a one-parameter read tool.

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 simple read tool with annotations present and no output schema, the description adequately covers what comes back but omits the two things an agent still needs: how to format a valid slug and what happens on a miss. Adequate, not complete.

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 0% and there is exactly one required parameter ('slug'), so the description carries the full burden of explaining it. It never states the slug format or where to obtain a valid one, only referencing the 'Agents Handbook' generically.

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 verb-and-resource pair ('Returns an agent profile') and enumerates the payload contents (strengths, limits, tool connections, playbooks, lessons). It does not explicitly contrast itself with get_playbook/get_lessons, though the content list implies a different granularity.

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 only implied: the reader infers this is the lookup-by-slug entry point for agent info, and the mention of playbooks/lessons within the profile hints it differs from the standalone get_playbook/get_lessons tools. No explicit when-to-use, prerequisites, or exclusions are stated.

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