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

With no annotations at all, the description carries the full behavioral burden. It does disclose two real traits — result ordering (newest first) and cross-platform aggregation (Sessionize + run.events) — but says nothing about pagination/limits, empty-result behavior for unknown ids, or whether the call is a pure read.

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 sentence with zero filler, front-loading what is retrieved, the ordering, and the data sources. Nothing could be removed without losing information.

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?

For a one-parameter lookup with a fully documented schema and no output schema, the description covers the essential scope and ordering. A brief note on whether results are capped or what happens with an invalid id would make it complete.

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 100% and the schema already explains that `id` is a speakerId from search_speakers or from an event's sessions. The description adds no additional meaning about the parameter, so the baseline 3 applies.

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?

Specific verb and resource ('Get every session a speaker has given') plus ordering ('newest first') and source scope ('across Sessionize and run.events'), which is more than a restatement of the name. It does not explicitly contrast itself with get_speaker or get_event_sessions, so sibling differentiation is left implicit.

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 explicit when-to-use or when-not-to-use statement. Usage is only implied by the name and shape (look up a speaker's history), and the useful routing hints ('speakerId returned by search_speakers') appear only in the schema, not the description.

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