storage_snapshot

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

The description discloses that the tool captures specific storage types and URL, but does not mention potential side effects (e.g., overwriting existing snapshots) or prerequisites like requiring an active page. Since no annotations are provided, the description carries the full burden and is adequate but not thorough.

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?

Two sentences concisely convey the action, rationale, and usage timing. The critical information is front-loaded in the first sentence. No wasted words.

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 tool pairs well with 'storage_diff' as suggested. It does not address naming conflicts, but given the simplicity and accessible sibling tools, the description is nearly complete for an agent to use correctly.

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 only parameter 'name' has no description in the schema (0% coverage). The description indirectly explains its purpose ('named slot'), but does not clarify allowed values, default behavior, or uniqueness constraints. The parameter adds minimal meaning beyond the schema.

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 'Capture cookies + localStorage + sessionStorage + URL into named slot for later diffing.' The verb 'Capture' and resource 'storage state + URL' are explicit, and the sibling tool 'storage_diff' indicates a distinct purpose for snapshotting vs. diffing.

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 instruction 'Use BEFORE an action you want to inspect' provides explicit timing advice. While it doesn't mention when not to use, it effectively distinguishes this from the sibling 'storage_diff' (use after action).

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