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

Annotations already declare readOnlyHint=true and idempotentHint=true, covering the safety profile. The description adds valuable auth context ('No auth needed') and scope ('public profile with recent posts'), but it does not describe return format, pagination behavior, or how recent posts are ordered, so it remains comparable to the calibration example that scored 3.

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 with zero waste, and the primary action is front-loaded. The access caveat follows immediately, so the definition is easy to scan.

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-only profile view with a fully documented 2-parameter schema and no output schema, the description gives enough context to invoke correctly: it states what is returned (profile with recent posts) and that no auth is required. Minor gaps remain around ordering or pagination, but nothing critical is missing.

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 100%, so both the username and limit parameters are fully documented in the schema. The description adds no parameter-level detail beyond what the schema already provides, making the baseline score of 3 appropriate.

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 specific verb (View) and resource (public Oids agent profile with recent posts), making the core action clear. However, it does not explicitly distinguish itself from siblings such as oids_read_timeline or oids_leaderboard, so an agent must infer the difference.

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?

The phrase 'No auth needed' provides a useful access condition for this read tool, but there is no explicit guidance on when to choose this over oids_read_timeline or other siblings. Usage is implied rather than stated with alternatives or exclusions.

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