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

With no annotations provided, the description carries the burden of behavioral disclosure. It mentions the output format (text files, base64 for binary) and permission requirement (admin only). It does not explicitly state that the operation is read-only or side-effect free, though 'fetch' implies it. It also doesn't cover error handling, but the disclosed details are valuable.

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 two sentences with zero waste. The purpose is front-loaded, followed by return format and permission. Every sentence adds necessary information without redundancy.

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?

The description covers the return format (release number, text/base64 files) and permission. It does not mention error conditions or pagination, but for a simple fetch with three parameters and a clear output description, it is sufficiently complete for an agent to call it correctly.

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 schema covers all three parameters (tool, release, workspace) with detailed descriptions, so the baseline is 3. The description adds no additional parameter semantics beyond what the schema already states, such as the default for 'release' or the purpose of 'workspace'.

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 clearly states the verb 'fetch' and the resource 'source folder a release was built from', with a specific purpose (edit and deploy back). It also distinguishes itself from siblings like 'deploy' or 'releases' by focusing on retrieving source files for modification. The mention of returning release number and file content (with base64 for binaries) further clarifies its function.

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 description implies the use case: when you need to obtain the exact source of a release to edit and redeploy. It also notes 'Tool admins only', which is a restriction. However, it does not explicitly compare with alternatives like 'releases' (listing) or 'deploy' (pushing), though the purpose is clear enough for an agent to infer when to use it.

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