save_sketch

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

With no annotations, the description carries the full burden, and it does establish that this writes in-memory state to disk, which is real behavioral content. It leaves out overwrite semantics (does it replace an existing saved file?), failure modes, and whether it needs an open editor session or an existing sketch on disk — gaps that matter for a persistence mutation.

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 no filler, and the key mechanic (in-memory to disk) is stated immediately. It is efficient but borderline terse for a mutation tool, with no follow-up clause about overwrite or prerequisites.

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?

The tool is simple (one required, well-documented parameter), so little prose is needed, but with no annotations and no output schema the description is the only source on safety and result behavior, and it omits overwrite/error semantics. Adequate, with clear gaps for a write operation.

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% for the single sketchId parameter, so the schema already explains it fully. The description adds no extra meaning, such as whether the ID must reference an already-open sketch or how an unknown ID is handled; 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?

The description names a specific verb+resource ('Persist the current in-memory state of a sketch to disk'), which clearly distinguishes a file-write from view/state operations. It does not, however, differentiate itself from plausible neighbors such as update_sketch, export_sketch, or snapshot_layout, leaving the agent to infer which one actually writes to disk.

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 statement of when to call this versus update_sketch (which presumably also mutates the sketch) or export_sketch/open_sketch. No prerequisites are given, such as whether the sketch must already be open or selected, and no exclusion or alternative is named.

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