remove_undo_barrier

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

Annotations already flag destructiveHint=true and readOnlyHint=false, but the description goes further and discloses return semantics that the schema and annotations cannot: `success` is hardcoded true, `removed` is the real oracle, and the call is an honest no-op (removed=false) when there was no barrier. This kind of oracle/no-op disclosure is exactly the behavioral context an agent needs before calling.

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?

Front-loaded with purpose, then the return warning, then the sibling alternative. Every sentence earns its place, though the capitalized emphasis ("THE oracle") and the returns block are a touch informal and slightly dense.

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 zero-parameter mutation tool with no output schema, the description is complete: it covers what the tool does, when to use it, the alternative, and the full return shape including which field to trust. Nothing an agent needs to call it correctly is missing.

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?

There are zero parameters, so per the rubric the baseline is 4. The description does not need to explain inputs, and instead spends its budget on the return contract, which is appropriate.

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+resource ("Lift the most recent undo barrier") and the effect ("so undo can step past it again"). It explicitly distinguishes itself from both set_undo_barrier (its counterpart) and clear_undo_barriers (drops every barrier), so an agent can pick it apart from siblings without opening a 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?

Gives an explicit when-to-use condition ("for when the protected batch is finished") and names the alternative with its own selection criteria ("Use clear_undo_barriers to drop every barrier at once"). Nothing is left to inference.

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