checksum_file

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

No annotations are present, so the description carries the full burden of behavioral disclosure. It only states that a hash is calculated; it does not explicitly disclose that the operation is read-only, the output format, or failure modes such as missing or unreadable files. This is a moderate gap for an unannotated tool.

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 a single, tightly written sentence that front-loads the exact operation. Every word earns its place, with no filler or redundant restatement of the tool name.

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 one-parameter checksum tool, the essential invocation information is present. However, because there is no output schema and no mention of the return format or error behavior, an agent must infer details about the exact response.

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?

The input schema fully documents the single parameter with 100% coverage, so the baseline of 3 applies. The description adds no new parameter-level detail, but none is really needed since the schema already describes file_path as the local path to the file.

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 uses a specific verb ('Calculate') and a specific resource ('SHA-256 hash of any local file'), leaving no ambiguity about the tool's function. It is clearly distinguishable from all sibling tools, which are media/image/video processing operations.

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?

There is no competing checksum/hash tool among the siblings, so the intended use case is clear by uniqueness. The description implies when to use it (whenever a SHA-256 hash of a local file is needed), though it does not explicitly state when not to use it or mention any prerequisites.

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