save_checkpoint

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

With no annotations provided, the description carries the full burden and successfully discloses that checkpoints capture the 'complete simulator state' and that names are 'auto-generated if empty'. It does not mention potential overwrites or storage limits, but covers the core behavioral contract.

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 ('Save a simulation checkpoint'), followed by behavioral context and sibling relationship, then the Args section. No redundant or wasteful sentences.

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?

Given the tool has an output schema (so return values need not be described) and only one parameter, the description is complete. It adequately explains the relationship to the restoration workflow and the checkpoint naming behavior.

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 0%, but the description excellently compensates by specifying the format constraint ('alphanumeric'), providing a concrete example ('chk_10ms'), and explaining the default behavior when empty.

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 uses a specific verb ('Save') and resource ('simulation checkpoint') and clearly distinguishes this from sibling tools by contrasting it with 'restore_checkpoint' in the text.

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?

Explicitly names the sibling tool 'restore_checkpoint' as the mechanism to return to the saved point, and provides the specific use case of avoiding 're-simulating from time 0'.

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