Email

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

Annotations already declare readOnlyHint=false, destructiveHint=false, openWorldHint=true, so the safety profile is partly covered. The description adds that this is a confirmation step in a 2FA setup flow, but says nothing about authentication requirements, whether the code is single-use or expires, or what account state changes on success.

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 short, front-loaded sentence with no filler. It is efficient, though its brevity borders on under-specification for a three-parameter mutation.

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?

With three undocumented parameters, no output schema, and an open-world mutation, the description leaves too much unspecified — no payload shape, no success/failure semantics, no indication of which sibling begins the flow it completes.

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 all three parameters are opaque passthrough blobs (form, params, json_body) with no titles or types. The phrase 'with the emailed code' hints at the payload content but never says which parameter carries the code or what the surrounding payload must contain.

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 names a specific action (confirm) tied to a specific flow (email-2FA setup) and the required input (the emailed code), so an agent knows roughly what it does. It does not distinguish itself from near-duplicate siblings such as vaultwarden_post_email_token, vaultwarden_verify_otp, or vaultwarden_post_verify_email, so routing still requires schema inspection.

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?

There is no statement of when to call this versus the many other token/verification siblings, and no prerequisites are given (e.g. that an email-2FA setup must already have been initiated and a code sent). The agent must infer the flow position from the one-line purpose.

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