workspace_root

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

With no annotations, the description carries the full burden, and it delivers the key behavioral fact: the server's access is confined to a single directory, which calibrates agent expectations about path scope for all sibling tools. For a zero-parameter getter with no side effects, there is little else to disclose; the read-only nature is strongly implied by 'return'.

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 eight-word sentence with zero filler. The key information — what is returned and the scope constraint — is front-loaded and every word earns its place.

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 tool with zero parameters, an output schema, and a description that fully captures its one behavioral constraint, nothing an agent needs to invoke it correctly is missing. There are no edge cases, prerequisites, or failure modes that the description would need to address at this complexity level.

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 is an empty object with 100% coverage and 0 parameters, so the baseline is 4. The description's reference to 'the single directory' adds the only meaningful context an agent needs, confirming there is nothing to configure before calling.

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 ('return') tied to a concrete resource ('the single directory') and adds a clear scoping qualifier ('this server can access'). This distinguishes it cleanly from the sibling file-operation tools like list_files, read_file, and git_diff, which operate on paths rather than revealing the access root.

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?

No explicit when-to-use or when-not-to-use guidance is given, and sibling tools are never mentioned. However, usage is reasonably implied: an agent naturally calls this first to learn where the server's filesystem access begins before pointing read_file/list_files at paths. The implication is clear but never stated.

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