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

No annotations are provided, so the description carries the full burden of behavioral disclosure. The single phrase 'US IPO / SPAC new listing calendar' conveys almost nothing about behavior: it doesn't state whether the tool is read-only, what the response format is, how filtering works, or any side effects. There is no mention of pagination, performance, or required permissions. This is a severe gap for a tool with zero annotation coverage.

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 description is extremely short, which is concision, but it is not structured or front-loaded with useful information. It is a single noun phrase that lacks any actionable content. While brevity is a virtue, under-specification is a flaw here; there is no effort to lead with the most important details, and the description is both vague and unhelpful.

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?

Given the absence of annotations, output schema, and parameter descriptions, the description is drastically incomplete. An agent cannot determine what the tool returns, how to interpret the output, when to use it, or what parameters mean. For a relatively simple tool with two optional parameters, this could be explained in a sentence or two, but the current description falls far short of that.

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%, and the description says nothing about the 'limit' or 'status' parameters. The parameter names are suggestive but not definitive (e.g., 'status' could mean IPO status, listing status, or something else). The agent cannot know what values to pass for 'status' or how 'limit' affects results. Since the schema provides no descriptions and the tool description does not compensate, this is a critical deficiency.

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 identifies a specific resource (US IPO / SPAC new listing calendar) but does not state an explicit verb or action. It is clear that this tool relates to US listing calendars, but it doesn't specify what is returned (e.g., dates, companies, statuses) or whether it covers upcoming or historical listings. It is distinguishable from siblings like 'get_earnings_calendar' by the IPO/SPAC focus, but the wording is a noun phrase rather than a proper purpose statement.

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 guidance on when to use this tool versus the many sibling tools (e.g., get_listing_hearings, get_corporate_actions, get_earnings_calendar). The description does not mention any preconditions, typical use cases, or exclusions. An agent has to infer when this tool is relevant, which is especially risky given the large sibling set.

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