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

The annotations already mark the tool read-only and non-destructive, and the description meaningfully adds safety-relevant behavior: untrusted/inert text, digest verification, rejection of links/traversal/binary files/oversized files, and no script execution. This goes well beyond the structured annotations.

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 front-loaded with the core purpose sees, then gives the essential path rulechery, and then lists behavioral constraints. Every sentence carries useful information with no filler.

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 simple 2-parameter read tool, the description covers operational constraints, file source, and safety behavior. The main remaining gaps are explaining what id refers to and describing the exact response/error format, especially since no output schema is present.

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 0%, so the description must explain the parameters. It clearly explains path as the exact relative path from list_skill_files, but it never explains id's role, format, or source. The agent can only infer that id identifies a catalog-bound skill bundle, which leaves a real gap.

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 action ('Read'), a specific resource ('one catalog-bound UTF-8 file from a local skill bundle'), and distinguishes itself from list/search tools by emphasizing 'one file' and 'exact relative path.' It is clearly not a listing or metadata tool.

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 gives a concrete usage rule: 'Use its exact relative path from list_skill_files,' and warns against expecting script execution or missing-file fetching. However, it does not explicitly name alternatives or say when another sibling such as get_skill would be preferable.

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