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

Annotations already declare readOnlyHint=false, idempotentHint=true, and destructiveHint=false, so the safety profile is covered by structured data. The description adds the implicit reassurance that only name and description are touched, leaving other project fields intact, but says nothing about required scope, error behavior, or what the call returns.

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 that front-loads the two supported operations with zero filler. Nothing could be removed without losing meaning.

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 three-parameter idempotent update with full schema coverage and complete annotations, the missing pieces are modest: no output schema exists, so the description could say whether the updated project is returned, and it omits any note about failure modes or permissions. Adequate but not thorough.

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 all three parameters are already documented, including the '"" clears it' behavior for description. The description adds only the framing that name and description are the modifiable surface of the project, which is marginally useful but largely redundant with the schema.

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?

States a specific verb-and-resource pair ('update_project' → 'Rename a project or change its description') and usefully narrows scope to exactly two mutable fields. An agent knows immediately this is not a general-purpose project mutation, though the description never contrasts it with siblings like create_project or delete_project.

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?

Usage is only implied: 'change its description' signals a modification operation on an existing project, and the required projectId makes the precondition evident. There is no explicit statement of when to reach for this versus create_project, delete_project, or get_project, and no mention of prerequisites or permissions.

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