Set categories, copyright and compliance

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

Annotations already declare readOnlyHint=false and destructiveHint=true, so the safety profile is covered structurally. The description usefully adds that unprovided fields are left untouched ('Each applied only if provided'), but says nothing about overwriting existing category/copyright values, permission/auth needs, or the 'Pro feature' gating implications beyond a terse label.

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?

Front-loaded with the enumerated fields, no filler sentences, and the partial-update caveat and 'Pro feature' note are compact. The sentence is dense to the point of being a field list, which slightly hurts readability but wastes nothing.

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 6-parameter, 1-required mutation with full schema coverage and no output schema, the description covers every settable field and the partial-update semantics. Remaining gaps are minor: no confirmation of return behavior or error/precondition handling.

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 the baseline is 3; the schema already documents each field including the encryption guidance. The description reiterates the same fields (categories, copyright, content rights, encryption) and adds the appCategory-id convention, but contributes little syntax or format detail the schema lacks.

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?

Specific verb (Set) plus the exact resources being set: categories, copyright, content-rights, and export compliance. It names concrete field values (appCategory ids like HEALTH_AND_FITNESS) and clearly distinguishes itself from siblings like set_age_rating, set_privacy_nutrition, and update_version_metadata.

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?

'Submission-required app basics' implies this is part of the pre-submission flow, and 'Each applied only if provided' clarifies partial-update behavior. However, it never says when to use this versus the many adjacent setters (set_age_rating, set_privacy_nutrition, update_version_metadata) or states any prerequisites such as the app being in an editable state.

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