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

Annotations set readOnlyHint=false and destructiveHint=false, so the mutation/non-destructive profile is already known. The description adds no behavioral context such as whether this fully replaces fields, overwrites message history, or requires permissions, so it contributes nothing beyond structured data.

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?

Two words are front-loaded but under-specified rather than concise; for a PUT tool with a nested body, additionalProperties, and full-replace semantics this is far too thin. Under-specification, not brevity, is the problem.

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?

This is a complex mutation (nested object, PUT full-replace, additionalProperties true) and the description conveys none of the key semantics. Although the schema partly compensates and an output schema exists, the description itself leaves an agent without enough behavioral context to invoke 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?

Schema description coverage is 100%, so the schema already documents project_id and the nested project object. The description adds no meaning, but the baseline for fully-covered schemas is 3.

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?

"Update a project." restates the tool name and title without adding a specific verb+resource distinction, and it never contrasts with the obvious sibling projects_patch or requirements_update/stories_update. It is effectively a tautology rather than a description of what changes.

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 gives no when-to-use, prerequisites, or when-not guidance. The only routing hint ('Provide full data; use projects_patch for partial updates') lives in the input schema, not the description, so the description itself offers nothing.

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