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

With no annotations, the description must disclose behavioral traits, but it only says the handle becomes available again. It does not mention whether the operation is destructive, reversible, requires ownership, or what happens to associated data, leaving significant ambiguity for a mutating action.

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 a single, front-loaded sentence that avoids any wasted words. It states the action and the outcome efficiently without redundancy.

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?

Although the tool has only one parameter and no output schema, the description lacks essential context for a mutating operation, such as reversibility, required prerequisites, or side effects. Without annotations, this brevity leaves the agent under-informed about the tool's full impact.

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?

The schema fully documents the sole parameter 'slug' with the description 'The handle to release', so the schema coverage is 100%. The tool description adds no additional meaning beyond the schema, so a baseline score of 3 is 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?

The description uses a specific verb ('Release') and resource ('free identity handle'), making the tool's purpose clear. It also implicitly distinguishes itself from sibling tools like claim_identity and update_identity by indicating the handle becomes available again.

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 clearly indicates the tool is for freeing an identity handle so it can be reused, which provides context for when to use it. However, it does not explicitly mention alternatives or exclusions, such as 'use claim_identity to acquire a handle'.

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