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

Annotations give readOnlyHint=false, destructiveHint=false, and openWorldHint=false, so the safety profile is partly covered, but the description adds nothing beyond that. Several listed actions are state-changing (session_end, time.invoice_paid, tell with a replaces? field) yet the description never says whether they overwrite prior records, are idempotent, or require the actor parameter for authorization. For a mutation-capable tool this is a significant gap, though nothing contradicts the annotations.

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?

The action/parameter inventory earns its place for a ten-action dispatcher, but the framing sentence is a riddle that delays the actual function, and the whole block reads as one run-on sentence dense with parenthetical optional flags. Front-loading is poor: the most useful information (the action list) arrives after a metaphorical paraphrase.

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?

This is a high-complexity, multi-action tool with nested free-form params, no output schema, and no enums, so the description should explain at least what an action returns or how actions relate (e.g., run identifiers used across session_update and session_end). Instead it points at 'query actions' for documentation and leaves behavior, return shapes, and action failure modes unspecified. Adequate only as an index, not as a usable definition.

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 only 33% (only actor is documented), and the action parameter has no enum, so the description carries real weight here: it lists all ten action names with their optional and required parameters, which effectively supplies the missing enum. However, the parameter names themselves (run, said, about, lens, style, surface, fresh, focus, look, scheme) are never given meaning, leaving an agent to guess at values and formats. It compensates for the missing enum but not for the missing semantics.

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 tool name is a single generic word, and the description opens with an oblique paraphrase ('Say that something happened or is so: progress, a result, a payment, a check that it still holds') rather than a verb+resource statement. The enumeration of concrete actions (session_update, run_report, tell, show, health, software.test_report, time.invoice_paid) does eventually make clear it is a multi-action event/status reporting dispatcher, but nothing distinguishes it from siblings such as query, ask, or settle.

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 when-to-use or when-not-to-use guidance, no mention of prerequisites, and no contrast with the many siblings. The only procedural hint is 'Call with the action and its params,' which describes invocation mechanics rather than when this tool is the right choice. The closing 'query actions says what each does' is ambiguous (the sibling tool query vs. querying actions) and defers the guidance entirely.

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