Create Sequence Checkpoint

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

Annotations only declare non-destructive/not-idempotent; the description adds real behavioral context beyond that — verification of the clone's track and clip counts, re-activation of the original, and an explicit 'never deletes or overwrites' guarantee. It does not, however, mention permissions or failure handling, so it is strong but not exhaustive.

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?

Three tight sentences, front-loaded with the core action and followed by the guarantee and side-effect details. No filler or restatement of the name.

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?

With an output schema present, the description correctly focuses on behavior rather than return fields, and it explains the snapshot's downstream use. A brief note on failure modes or the meaning of a non-idempotent checkpoint would complete it, but 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?

Schema description coverage is 100%, so label, sequence_id, and include_snapshot are already fully documented in the schema. The description adds the '[checkpoint]' naming convention and the snapshot's purpose, but nothing about parameter syntax or defaults beyond the schema. Baseline 3 applies.

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 (clone a sequence into a checkpoint copy) and further specifies the distinctive behavior: a named '[checkpoint]' copy plus a diff_sequence_snapshots-compatible snapshot. This distinguishes it from the sibling duplicate_sequence, which clones but does not produce a checkpoint snapshot.

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 a clear when-to-use trigger ('before a risky edit') and names the downstream consumer (diff_sequence_snapshots) for the returned snapshot. It lacks an explicit contrast with duplicate_sequence or create_project_backup, so the alternative condition is implied rather than stated.

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