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

No annotations are provided, so the description carries the full burden and delivers very little. It implies a read-only lookup via the 'get_' name and hints at returned fields ('expected dates'), but says nothing about permissions, pagination, rate limits, or whether the calendar can be empty.

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 front-loaded sentence with no filler; the resource and its key attribute are stated immediately. It is arguably too terse rather than padded, but every word earns its place.

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 simple two-optional-parameter read tool with no output schema this is only minimally adequate: the agent learns what the tool returns but not the default window, the economy-filter behavior, or what an empty result means. The gaps are small but real.

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 50% — the economy enum has 'Omit for all economies' but the days parameter has no description, only constraints (default 14, min 1, max 60). The description mentions neither parameter, so it does not compensate for the undocumented default lookahead window.

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 names a specific resource ('data releases') and its temporal scope ('upcoming ... with expected dates'), which is enough to distinguish it from get_nowcast, get_aggregate, and get_track_record. It falls short of a 5 because it never explicitly contrasts itself with any sibling or states the operation verb (list/retrieve).

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 guidance at all: no mention of the default 14-day window, no indication of when to filter by economy, and no routing to or away from siblings such as list_economies. The only context is the implied tie to 'nowcasts'.

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