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

Annotations already declare readOnly, idempotent, non-destructive and closed-world, and the description does not contradict them. It adds real behavioral detail beyond the annotations: sensitive filenames and symlinks are excluded, directories are skipped, and results are zero-based include/exclude/skip indexes with reasons that must be mapped back to input. Only minor gaps (e.g. pagination/limits) remain.

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?

Purpose is front-loaded in the first sentence and the rest is mostly load-bearing routing and safety constraints. Slightly dense with overlapping prohibitions ('No credentials or payment' / 'Never send contents, secrets...') that could be consolidated, but nothing is egregiously wasteful.

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?

With an output schema present, return values need not be spelled out, and annotations carry the safety profile. The description still covers scope, exclusions, index-mapping semantics and explicit non-goals, leaving little an agent would need to guess for a single-parameter tool.

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. It clarifies that paths are relative and supplies the concept of 'file kinds' (matching path/kind), and mentions symlinks/directories behavior, but does not enumerate the kind enum values or the 512/1024 limits. Partial compensation for a low-coverage schema.

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?

States a specific verb (prepare), resource (repository handoff plan) and scope (filename-only, from relative paths and file kinds). It also distinguishes itself from the sibling repository_safety_preflight by explicitly declaring 'NOT a content security scan', so an agent can route correctly.

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?

Gives a positive trigger ('Use when asked to select files for another agent or reviewer') and multiple explicit exclusions ('Do not call for general advice', 'to claim that file contents are safe', 'permission to upload'). When-to-use and when-not-to-use are both covered without inference.

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