checkpoint

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

Annotations already indicate the tool is not read-only and not destructive. The description adds useful behavioral detail beyond that by specifying the side effect: writing an .xisf file into the checkpoints directory and returning a path for later restore. It does not cover naming/overwrite behavior, but annotations reduce the burden.

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?

A single sentence packs in the action, file format, target directory, and return value. It is front-loaded with the core operation and contains no filler.

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 simple two-parameter tool, the description is reasonably complete: it states what is written, where, and what is returned. However, it leaves parameter meanings implicit, especially 'label', and provides no explicit when-to-use guidance. This is adequate but has clear gaps.

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%, so the description must compensate. It hints that a 'view' is the subject, which loosely maps to the required 'id' parameter, but it never explains what 'id' identifies or what the optional 'label' means. This is partial guidance at best.

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 ('Write'), names the concrete artifact ('.xisf checkpoint of a view'), and states the destination ('session's checkpoints/ dir'). It also connects the tool to restore_checkpoint, clearly distinguishing it from siblings like restore_checkpoint or list_checkpoints.

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 'returns the path for restore_checkpoint' gives clear contextual guidance: this tool is for creating a restore point that will later be used by restore_checkpoint. It does not explicitly list alternatives/exclusions, but the intended workflow is clear enough for an agent to choose it over unrelated save operations.

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