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

Annotations are all false and provide minimal information. The description adds little beyond stating the mutation (rename/move) and does not disclose important behavior such as whether targetDate null clears the date, whether fields are overwritten, or side effects. It does not contradict annotations.

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 wasted words. It is appropriately compact, though it could be slightly expanded to cover the missing description field without becoming verbose.

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 4-parameter mutation tool with no output schema and weak annotations, the description is incomplete. It omits the description field and fails to clarify null targetDate semantics, leaving an agent potentially unaware of full update capabilities.

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?

The description adds meaning to name ('rename') and targetDate ('move its target date'), which is useful since name lacks a schema description. However, it entirely misses the description parameter, and with schema coverage at 50%, it only partially compensates for the gap.

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 tool updates a milestone and specifies two actions (rename, move target date), which distinguishes it from create/delete/list milestones. However, it omits the ability to update the description field, making its stated purpose incomplete relative to the schema.

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?

No guidance is given on when to use this tool versus alternatives like create_milestone, delete_milestone, or reorder_milestones. There is no mention of prerequisites or scenarios where this tool is appropriate or not.

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