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

Annotations already cover the safety profile (readOnly, idempotent, non-destructive), so the bar is lower, yet the description adds real value: the read is a BOUNDED preview (not the whole file), the encoding is UTF-8, and the returned content is untrusted data. It omits truncation/return-shape details, but the security and scope disclosures are substantive.

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?

Three short sentences, each earning its place, with the core action and scope front-loaded ahead of the usage constraint and safety warning. No redundancy or 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?

Covers the origin of the filename, the preview/bounded nature, and the untrusted-content caveat, but with 0% schema description coverage, four required parameters, and no output schema, the definition leaves parameter meaning and output limits unexplained. Adequate but with clear gaps for a four-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% and the description explains none of the four parameters. 'Bounded' and 'preview' hint at max_bytes/max_lines but never name or clarify them, and job_id is entirely unspecified. With the schema doing no work here, the description fails to compensate for the coverage 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?

States a specific verb and resource (read/bounded UTF-8 preview of a job file) and ties the file to get_result as its source, which helps separate it from generic siblings like read_file and get_file. It does not explicitly name those siblings, so differentiation is implied rather than stated.

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 clear precondition ('exact file name returned by get_result') and an explicit prohibition ('Never invent paths'), which tells the agent exactly where the filename must come from. It stops short of naming alternatives (read_file, list_files) or stating when this tool is preferred over them.

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