scratchjr_save_project

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

Adds behavioral detail beyond annotations by mentioning thumbnail regeneration and durability ('flush all data to disk'). It aligns with readOnlyHint=false and destructiveHint=false, and gives the agent a realistic sense of the side effects of saving.

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 compact sentence with no filler. All three key behaviors—save, regenerate thumbnail, flush—are front-loaded and necessary.

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 save operation, the description is complete: it identifies the resource and the persistence behavior. No output schema is present, but no return-value documentation is essential for a straightforward save command.

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 tool has zero parameters and the empty schema is fully covered, so there is nothing for the description to add about arguments. The baseline of 4 for no parameters 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?

Clearly states the action (save), the target resource (open project), and key side effects (regenerate thumbnail, flush to disk). The behavior is unambiguous and distinct from siblings like screenshot, export, or backup.

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 makes the invocation context clear: use this when the open project should be persisted to disk. It does not explicitly name alternative tools such as export or backup, but the operation's purpose is specific enough to avoid major confusion.

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