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

With no annotations, the description carries the full burden. It usefully discloses the returned artifact (code + link) and the access model (any browser, no account, no download), but says nothing about permissions, what happens on repeated calls (multiple meetings created?), or whether the caller becomes the host/participant.

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?

Three short sentences, front-loaded with the action and the return value. Each sentence carries distinct information: what it does, how the link can be shared, and the dependency that matters for callers.

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 correctly explains what comes back (code and link) and how it is consumed. For a two-optional-parameter creation tool this is nearly complete, though it omits host/participation semantics that would matter when several meeting tools are available.

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 100% and the mode enum is documented in depth, including defaults, so the schema does the heavy lifting. The description adds nothing about mode or topics, leaving the baseline score appropriate rather than earning above it.

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 ("Start a new meeting") plus the immediate payoff ("get its code and link"). The line "Nobody can join a meeting that was not started this way" implicitly separates it from join_meeting, but the sibling is never named, so the differentiation is inferred rather than stated.

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 clear context for when this tool is required: it is the prerequisite for anyone joining, and the resulting link needs no account or download. There is no explicit when-not clause or named alternative such as join_meeting or list_meetings, so it falls short of the 5 bar.

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