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

Annotations already declare readOnlyHint=true and openWorldHint=false, so a lower bar applies, but the description still adds real behavioral context: content is aggregated automatically (press releases 'found automatically'), carries an inherent 10–60 minute publication lag, and includes derived editorial material. Nothing here contradicts the closed-world, read-only 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 key reframe is front-loaded in the first clause, and the long parenthetical org list earns its space by pinning down coverage. It is dense but single-paragraph and readable; the enumerations could be trimmed but carry selection value.

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 no output schema and all four parameters optional, the description covers content, sourcing, timing and filtering well enough to call the tool correctly. The remaining gap is result volume/ordering and what limit does, which an agent would have to discover by calling it.

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 75% and the description goes beyond it by expanding org values (SpaceX/Starlink, Google/DeepMind Gemini) and explaining that radar headlines are drawn from 'the matching Orb Studio radar', giving the radar parameter meaning. The limit parameter (1–50) is never addressed, so the semantics are not fully closed.

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 with a reframing hook ('You cannot hear live broadcasts — this gives them as text') followed by an explicit inventory of what the payload contains: event schedule with UTC times and stream links, plus post-event status, press releases, radar headlines and an editor's summary. The listing of covered orgs (ECB, Fed, Bundestag, OPEC+, SpaceX, Anthropic, Google) makes it distinguishable from generic siblings like get_broadcast or get_radar without opening any schema.

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 selection context: use this when you need broadcast content as text rather than audio, and it states the freshness constraint ('text appears 10–60 minutes after the event, not in real time') plus the status filter for upcoming/live/past. It does not explicitly say when to prefer get_broadcast, get_radar or get_radars instead, so there are no named exclusions.

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