extension_write_fuse

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 states 'writing into the Fuses directory' but does not mention overwrite defaults, potential to replace existing files, filesystem side effects, or permissions. The schema describes the overwrite parameter, but the description itself omits this context.

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, front-loaded sentence with no unnecessary words. It directly states the action and target location, earning a perfect conciseness score.

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?

Given the simple write operation, 100% parameter schema coverage, and the presence of an output schema, the description is largely complete. It states the purpose and destination. However, it could have mentioned the overwrite default behavior (which is only in the schema) to provide fuller contextual awareness for a file-writing 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 coverage is 100%, so baseline is 3. The description adds minimal parameter meaning beyond the schema, only indirectly referring to 'Lua source' and 'Fuses directory', which aligns with code and name parameters but does not clarify semantics beyond what the schema already provides.

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 ('Install') and resource ('Fuse by writing its Lua source into the Fuses directory'), clearly distinguishing it from sibling tools like extension_remove_fuse (removal) and extension_write_script (different file type).

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 usage (install a Fuse) but does not explicitly state when to use this tool versus alternatives, nor does it mention exclusions or prerequisites. It relies on the tool's name and context.

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