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

With no annotations, the description carries the full burden of behavioral disclosure. It correctly indicates the operation is a read and that only text-based files are supported, but it does not mention error behavior for non-text files, encoding, size limits, or return format specifics. This is acceptable but minimal for a simple getter.

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?

A single clear sentence that front-loads the action and object. Every word contributes meaning, and the parenthetical examples add useful scope without bloat.

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 one-parameter read-only tool with no output schema, the description is nearly complete: it states the action, the target file type, and examples. It could explicitly note what happens when a non-text file is requested, but the core calling context is adequately covered.

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 100% and the only parameter, file_id, is already documented as 'The UUID of the file'. The description adds no new semantic meaning beyond what the schema provides, so the baseline 3 applies.

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 specifies a clear verb ('Get'), a resource ('file'), and a precise scope ('text content from a text-based file'). This distinguishes it from siblings like get_image and get_image_url by limiting it to text-based formats.

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?

The phrase 'text-based file (txt, md, json, etc.)' implies this tool is for text files and not for images or binary files, but it does not explicitly state when to use this tool versus an alternative or name any sibling tool. The usage context is therefore only implied.

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