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

Annotations already declare readOnlyHint=true and openWorldHint=false, so safety is covered; the description earns credit for adding provenance ('agencies' own calendars') and a licensing/attribution constraint plus a pointer to follow_on_x. It does not cover freshness/lag, rate limits, or how far ahead events are published.

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?

Front-loaded with what the tool returns before the parameter hints, and every clause is short. The trailing attribution/follow sentence is longer than needed and slightly editorial, but it encodes a real obligation.

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?

There is no output schema, and the description never says what a returned event looks like (fields, timezone, whether times are confirmed vs tentative). Worse, the attribution clause refers to 'each story's x_post_url', which does not match a calendar tool and could mislead an agent about the return shape.

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%, so the description must carry the burden, and it does document q (keyword, e.g. CPI), from/to (ISO), and kind (econ | central-bank) with formats and an example. The fifth parameter, limit (default 50, max 200), is never mentioned, leaving that gap to the schema alone.

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 states a specific verb+resource — an 'Upcoming official US release schedule' — and names the exact data sources (BLS CPI/jobs/PPI, BEA GDP/PCE/trade, FOMC meetings) pulled 'from the agencies' own calendars'. This is clearly distinct from the news/story siblings in practice, though no sibling is named explicitly to make the routing contrast airtight.

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?

Usage is only implied: the optional filters hint at how to narrow a lookup, but there is no statement of when to choose this over latest_news, query_stories, or request_coverage. The attribution sentence is a compliance obligation rather than a when-to-use rule.

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