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

Annotations already declare readOnlyHint=false (a mutation) and destructiveHint=false, so the safety profile is covered. The description scopes the effect to 'the last undone change', adding some useful context, but says nothing about what happens when there is no undo history or whether the redo is itself reversible.

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?

One short sentence, front-loaded with the verb and scoped to the specific target. Nothing extraneous.

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 single-parameter mutation tool with full schema coverage and an output schema (so return values need no explanation), the description is close to complete. It could mention the precondition of an existing undo state, but the core is adequate.

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?

With a single parameter at 100% schema coverage, the schema fully documents project_id as a Project UUID. The description adds no meaning beyond it, which is the expected baseline when the schema does the heavy lifting.

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 (redo) and resource (last undone project change), which is immediately distinguishable from the sibling projects_undo. It does not explicitly name projects_undo as the inverse, but the phrasing leaves little ambiguity about the operation.

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 phrase 'last undone change' implies the usage context (this follows an undo), but the description never states when to use this versus projects_undo, nor any precondition such as an existing undo history. Usage is inferred rather than stated.

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