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

With no annotations, the description carries the full behavioral burden. It discloses the outward side effect (an email with a 6-digit code is sent) and the sandbox restriction, but says nothing about code expiry, rate limits, failure behavior for invalid emails, or whether a session token is created. That is partial disclosure for a stateful initiation tool.

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, front-loaded with the mode name and the core action, closing with the safety constraint. Slightly dense with stacked parentheticals, 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 6-parameter, 0%-coverage, no-annotation, no-output-schema tool needs considerably more explanation than this. The description omits the verification hand-off (presumably moltbound_human_sim_verify), what happens to the optional session_token and capability/service scoping, and what a successful call yields.

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% across 6 parameters, so the description must compensate and it does not. Only 'email' is implicitly explained; agent_name, capability (quote_only vs quote_and_bind), service_id (default '*'), jurisdiction, and session_token are never mentioned, leaving defaults and enum semantics entirely opaque.

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 concrete verb and resource: sends a 6-digit verification code to an email address to initiate simulated-human mode. It conveys the mechanism (email-only, no browser passkey), but it does not distinguish itself from siblings like moltbound_start_session or name moltbound_human_sim_verify as the follow-on step.

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 sandbox-only constraint ('use fictitious data only') is a genuine usage condition, but it's about data safety rather than tool selection. There is no guidance on when to pick this versus moltbound_start_session or how it relates to moltbound_human_sim_verify / moltbound_human_sim_approve.

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