set_local_storage_item

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

With no annotations, the description carries the full burden but does disclose the core write behavior and the storage scope ('page's localStorage'). It does not mention overwriting existing keys or persistence details, but 'set' and 'localStorage' reasonably imply those semantics.

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, front-loaded sentence with no filler; every word earns its place. The structure is ideal for a two-parameter setter.

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 localStorage setter with an output schema and obvious required parameters, the description covers the essential action. However, with no annotations, usage guidance, or parameter elaboration, it leaves some context (overwrite behavior, when to choose this over session storage) to inference.

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% and the description does not explain what 'key' or 'value' represent, only that a value is set. The parameter names are somewhat self-explanatory, but the description adds no semantic detail 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?

Description uses a specific verb ('Set') and resource ('page's localStorage'), clearly distinguishing it from get_local_storage_item and set_session_storage_item. The action and target are unambiguous despite being terse.

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 explicit when-to-use or alternative guidance is provided; however, the wording implies it is for setting localStorage values as opposed to getting them or using session storage. This is sufficient for a straightforward setter but lacks any exclusionary hints.

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