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

Annotations already declare readOnlyHint, idempotentHint, non-destructive, and closed-world behavior, so the safety profile is fully covered. The description adds context beyond that: it discloses that the secret is never returned (a security guarantee) and that the output includes a count of dependent forms. It doesn't discuss accuracy, staleness, or boundaries of the count, which keeps it from 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?

Two sentences, both earning their place: the first states what is reported, the second front-loads an important security caveat. No filler or 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?

An output schema exists, so return values need not be explained, and with no parameters and full annotation coverage this description is nearly sufficient. The only mild gap is a lack of explicit routing to the enable/disable siblings for an agent deciding what to do with the status.

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 tool takes zero parameters, so per the rubric the baseline is 4. The description makes no parameter claims and needs none.

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 read resource (identify() enforcement state) and the scope of what it reports (whether enforcement is on, plus how many forms depend on it). It is clearly a read-only status check, which implicitly separates it from fillo_enable_identity and fillo_disable_identity. It stops short of naming those siblings explicitly.

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 when-to-use statement, no prerequisites, and no mention of the alternative mutation tools (fillo_enable_identity / fillo_disable_identity). Usage can be inferred from the read-only nature of the tool, but the description provides no explicit guidance.

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