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

With no annotations provided, the description carries the full burden of disclosing side effects and behavior. It only states the high-level purpose and omits important details such as whether the checkpoint overwrites existing data, any permissions required, or what the response looks like. This is a significant gap for a write operation.

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 sentence that is both concise and front-loaded, clearly communicating the core purpose without any unnecessary words. It earns a perfect score for efficiency.

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 simplicity of the tool (2 params, no output schema), the description remains incomplete. It does not explain the lifecycle of a checkpoint, how to resume after a crash, whether the operation is idempotent, or what the return value is. This leaves the agent under-informed for a state-saving tool.

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 input schema fully documents both parameters (id and state) with descriptions, so schema coverage is 100%. The tool description adds no additional parameter semantics beyond what the schema already provides, which is the baseline for this dimension.

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 action ('Save run state') and its intended purpose ('resume after a crash'), which is specific and informative. However, it does not explicitly distinguish itself from the sibling tool 'create_checkpoint', which likely serves a similar role, leaving some ambiguity about when to use which.

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 phrase 'so you can resume after a crash' implies the usage context: saving state for crash recovery. However, the description provides no explicit guidance on when to use this tool versus alternatives like 'create_checkpoint' or 'load_checkpoint'.

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