coronium_set_modem_os

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

With no annotations, the description carries the full burden for behavioral disclosure, but it only states the action and a use case. It does not disclose whether the change is persistent, takes effect immediately, requires a modem restart, or has potential side effects on existing connections. This is a significant gap for a mutating 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 remarkably concise: two sentences, with the primary action and resource stated up front. Every word contributes to understanding, and there is no redundant or filler content.

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 description is incomplete for a setter tool with no annotations. It lacks guidance on how to discover valid preset values (e.g., via coronium_get_p0f_options), does not mention prerequisites like authentication, and does not address potential impacts of changing the fingerprint. The schema covers parameters well, but the overall operational context is underspecified.

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 100%, so the baseline is 3. The description adds minimal extra meaning by explaining the 'advertise' aspect and providing examples of preset names, but it largely mirrors the schema. It does not introduce new parameter-specific behavior beyond what the schema already provides.

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 (Set), the resource (p0f OS fingerprint preset), and what it does (the modem should advertise). It distinguishes itself from sibling tools like coronium_get_p0f_options by focusing on the setting action, and it gives concrete examples of valid values (Android / iOS / Windows), making the purpose unambiguous.

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 description provides a clear use case: 'Useful when the destination platform fingerprints clients.' This gives the agent a contextual trigger for when to use the tool. However, it does not explicitly mention alternatives or when not to use it, such as referencing coronium_get_p0f_options for listing valid presets.

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