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

Annotations already declare idempotentHint=true and openWorldHint=true, and the description goes well beyond them: the returned key is never shown but sealed to an X25519 recipient header, bound to a registration key header that is a secret rather than an argument, and must be opened by the local helper. It also defines the exact idempotency envelope (same arguments, same connection, same network, within the recovery window, before first key use).

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?

Front-loaded and readable, but the second paragraph substantially repeats the first: the header requirements, the sealed-key behavior, and the retry rules are stated twice. It does add genuinely new material (the RPC path, the same-network constraint, the recovery window, the reference URL), so the redundancy is costly but not pure duplication.

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?

No output schema exists, and the description does say what comes back (the bot plus a sealed key) and how to open it. Header prerequisites, retry semantics, and the legal gate are all covered for a mutation tool with nested-object arguments; only rate limits and the sealed-blob format are left implicit.

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?

With schema coverage at 50%, the description compensates well for the riskiest parameter: legal_acknowledgement is framed as an operator claim recorded as unverified, never a default, gated on the deployment's legal requirements and an exact Terms version. Name, description, and username are only restated, and their length/pattern constraints live in the schema, so this is strong but not fully additive.

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 and resource ('Register one new LIMITED bot') plus the field set (name, description, optional username) and the decisive precondition (a connection WITHOUT an API key). The endpoint reference (v1.bots.register, POST /api/v1/bots/register) removes any ambiguity about what is being invoked, and the unkeyed-connection constraint separates it from key-recovery/listing siblings.

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?

Explicit when-to-use (unkeyed connection), explicit when-not (never register a second bot to get around a problem, never re-register with other arguments or another registration key), and explicit conditional guidance for legal_acknowledgement ('only if your operator authorised that exact Terms version; never accept Terms yourself'). Retry conditions are spelled out rather than left to inference.

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