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

With no annotations, the description carries the full burden. It does disclose meaningful behavior: the key is used only for this call and never stored, and the operation is an upsert ('or update'). It omits permissions, whether prior registration is required, name-collision behavior, and any rate limits.

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?

One compact sentence with parentheticals; the core action is front-loaded and every clause carries information. Slightly dense but no wasted text.

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?

A four-parameter mutation tool with no annotations and no output schema needs more than one sentence to be fully callable. It covers the signing model and optional payout but leaves out return expectations, prerequisites, and the semantics of two undocumented parameters.

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 coverage is 50% (payout and secret are documented in-schema; name and about are not). The description adds that payout is optional and reinforces the ephemeral key handling, but says nothing about name length/uniqueness constraints or what 'about' is for, so it only partially compensates.

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?

States a specific verb+resource combo ('Register (or update) your profile') and clarifies it is an upsert rather than a create-only operation, plus the optional payout. It distinguishes the hosted-signing path from the self-signing sibling ronin_submit, though it does not differentiate from other profile-adjacent tools such as ronin_me.

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?

Gives an explicit routing rule: use this tool for hosted signing, or 'sign yourself with ronin_submit' as the alternative. It does not state prerequisites (e.g. obtaining a key via ronin_new_key) or when-not to call, so it stops short of full when/when-not guidance.

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