checkpoint_create

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It mentions the composite nature (level save + metadata snapshot) but does not disclose potential side effects, overwrite behavior, permission requirements, or whether the operation is reversible. This is a significant gap for a mutation tool.

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?

The description is a single, front-loaded sentence that efficiently conveys the tool's purpose. There is no redundant information or filler, making it immediately scannable and easy to parse.

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 description provides the essential purpose but lacks deeper context about what a checkpoint entails, when it should be used relative to level_save, or what happens after creation. It is minimally complete for a simple two-parameter tool with no output schema, but leaves room for important operational details.

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%, with both name and description parameters clearly documented. The tool description adds little beyond saying 'named save point', which aligns with the required name parameter but does not clarify the significance of the optional description or the metadata snapshot relationship. Baseline of 3 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?

The description clearly states the tool creates a named save point, specifying it's a level save plus metadata snapshot. This distinguishes it from sibling tools like level_save (which only saves the level) and checkpoint_restore (which restores), leaving no ambiguity about its function.

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?

No guidance is provided on when to use this tool versus alternatives such as level_save or checkpoint_restore. The description implies a composite save operation but does not explicitly state when this is preferable or when to avoid it, leaving the agent to infer usage.

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