undo

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

With no annotations, the description carries the full behavioral burden. It discloses a genuinely important trait: the undo is global and will also revert the user's own manual edits, which is a useful warning. However, it omits reversibility (no redo), whether it operates on a project-wide undo stack, and any confirmation/irreversibility behavior.

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 front-loaded sentence with zero waste; the scope qualifier is appended compactly via parentheses. Nothing in it is redundant or padded.

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 mutation tool with no annotations, no output schema, and an undocumented parameter, the description is thin. It never explains the 'steps' argument, does not state whether the operation is recoverable, and gives no indication of what a caller gets back after invoking it.

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 single 'steps' parameter has 0% schema description coverage and is never mentioned in the description, so the agent gets no guidance on its meaning, default (1), or the 1-50 range. The phrase 'the most recent changes' (plural) faintly hints at multi-step undo but does not compensate 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?

States a specific verb ('undoes') and resource ('the most recent changes in REAPER'), and adds the scope qualifier that both Claude's and the user's changes are covered. It's clear what the tool does without opening the schema, though there are no sibling alternatives to differentiate against (no redo tool exists in the list).

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 description only asserts what the tool does; it gives no explicit when-to-use guidance, no note on when not to use it, and no mention that there is no redo counterpart to recover from it. Usage must be inferred entirely from the name and one sentence.

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