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

Annotations already signal mutation (readOnlyHint=false) and non-destructiveness (destructiveHint=false); the description adds the specific constraint that delete is not supported. It does not disclose side effects like whether rename overwrites an existing project or what the response contains, so it is adequate but not rich.

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?

Three short sentences, all informative; front-loaded with the core purpose, then action rules, then boundary. No filler.

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 simple create/rename tool with full schema coverage, the description covers supported actions and their parameter requirements, and flags the unsupported delete. The main gap is no mention of return/result, but since there is no output schema and the operations are simple, this is a minor omission.

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 id, name, action, and description. The description's action=create/rename rules are a useful restatement but add little new meaning beyond the property descriptions.

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 names the resource ('projects') and the exact mutations it supports ('create or rename'), and explicitly rules out delete. This clearly distinguishes it from read-only siblings like projects_read.

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?

It gives action-specific parameter rules ('action=create needs name; action=rename needs id and name'), which tells an agent how to select the correct invocation, and says delete is unsupported. It does not name read-side alternatives like projects_read for inspection use cases, so the guidance is clear but not fully explicit about alternatives.

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