get_user_profile

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

With no annotations provided, the description carries the behavioral burden. It states the operation is 'Anonymous' and accesses 'public' data, which clarifies authentication and access-level expectations. It doesn't cover error behavior or explicitly state read-only semantics, but the verb 'Get' makes that reasonably clear.

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?

The description is two concise sentences with no wasted words. The primary purpose is front-loaded, and 'Anonymous.' earns its place by conveying authentication behavior. This is an ideal size for a simple single-parameter 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-only profile tool, the description covers the core essentials: what is returned (trust level, bio, stats), that the data is public, and that no authentication is needed. There is no output schema, so the return-content hints are valuable. It doesn't mention edge cases like missing usernames, but that is a minor gap for this level of complexity.

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%, so the description must compensate for parameter meaning. It does not explain the username parameter's format, requirements, or how it maps to the returned profile, leaving the agent to rely on the parameter name alone. The name 'username' is self-explanatory, so this is not a 1, but the description adds little value.

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: 'Get a user's public profile' and lists the key contents (trust level, bio, stats). It is clear and distinguishable from get_current_user, but it does not explicitly differentiate from similar siblings like get_user_summary or search_users.

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 description implies the use case: fetch a public profile by username, and 'Anonymous' suggests it can be used without authentication. However, it provides no explicit guidance on when to choose this tool over get_current_user, get_user_summary, or search_users.

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