undo_last

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It only says 'Undo last mutation,' which reveals the action but not its effects, reversibility, what qualifies as a mutation, whether the mutation is global or project-scoped, or whether undoing may itself be destructive.

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 brief and front-loaded, but it is under-specified rather than usefully concise. One short sentence provides no additional behavioral, contextual, or parameter information, so the brevity does not earn its place.

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?

Given that this is a mutation tool with no annotations, no output schema, and zero parameter documentation, the description is incomplete. It leaves critical operational questions unanswered and would not reliably guide an agent to invoke it correctly in all relevant scenarios.

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 schema documents one required parameter, project_id, with no description (0% coverage). The description adds no meaning about project_id and does not clarify that the undo is scoped to a specific project. The parameter name is self-explanatory, but the description fails to compensate for the absence of schema documentation.

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 states a clear verb and object: 'Undo last mutation.' However, 'mutation' is undefined and the scope (per project, per session, global) is ambiguous, even though project_id is required. It does not distinguish itself from other mutation-related siblings, though no sibling is an explicit 'undo'.

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?

There is no explicit guidance about when to use this tool versus alternatives. The natural implication is to use it after a recent unwanted mutation, but the description never states conditions, prerequisites, or exclusions, nor does it reference sibling tools such as rem_update or trace_add.

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