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

Annotations already declare this a non-read-only, destructive, non-idempotent mutation; the description adds real value on top with per-operation permission requirements, cost ('Free'), and authentication needs, which annotations cannot express. It stops short of clarifying what is actually lost when visibility flips to restricted (implied loss of member access) or what the call returns, leaving the destructive hint only partially explained.

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 action, then the enum semantics, then cost and auth in short fragments — nothing is padding. The first sentence is densely packed with nested parentheticals, which costs some readability but not correctness.

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 3-parameter mutation with annotations but no output schema, the definition covers the essentials: access requirements, enum meaning, auth, and cost. Minor gaps remain on precedence when both name and visibility are supplied and on the response shape, but nothing blocking an agent from calling it correctly.

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 coverage is only 33% (only 'id' is documented in the schema), so the description must carry the load, and it does: it explains exactly what 'org' and 'restricted' mean in terms of who retains access, which is the single most consequential parameter. The 'name' parameter is covered indirectly by 'Renames', and the rename/visibility mapping to the two optional inputs is clear.

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 resource (a library file) and two concrete operations: renaming and setting visibility. It is immediately distinguishable from read-only siblings like get_file or list_files, but it never explicitly contrasts itself with nearby write siblings such as save_file, share_file, or delete_file.

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?

It states the prerequisite access level for each mode ('write access' to rename, 'admin access on the file' for visibility) and the authentication requirement, which is useful context for whether the call will succeed. However, it gives no explicit when-to-use-this-instead-of guidance and no exclusions, so an agent must infer the boundary against save_file and share_file.

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