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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It states the tool writes files, implying a mutation operation, but does not address permissions, error handling, file overwriting behavior, or output format. This leaves significant gaps in understanding the tool's behavior beyond the basic action.

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, efficient sentence that directly states the tool's purpose without unnecessary words. It is front-loaded and appropriately sized for the complexity, with no wasted information.

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 tool's complexity (file writing with nested array parameters), lack of annotations, no output schema, and incomplete parameter documentation, the description is insufficient. It does not cover behavioral aspects, error cases, or detailed usage, making it inadequate for safe and effective tool invocation.

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 50% (only 'outputDir' has a description), and the description does not add any parameter-specific details beyond what the schema provides. It mentions 'files' generally but does not explain the structure or usage of the 'files' array. The baseline is 3 due to moderate schema coverage, but the description fails to compensate for the undocumented 'files' parameter.

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 action ('write files') and the target ('for an MCP server'), specifying the purpose as file creation based on user discussion. It lacks explicit differentiation from siblings, but since there are no sibling tools, this is not a deficiency.

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 provides minimal guidance by mentioning 'based on our discussion with the user,' which implies usage context but does not specify when to use this tool versus alternatives, prerequisites, or exclusions. With no sibling tools, the lack of comparative guidance is less critical, but overall guidance remains vague.

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