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

The annotations declare readOnlyHint=false while the name get_precursor_signals and the verb "Retrieve" describe a pure read operation, which is an inconsistency the description does nothing to resolve. Beyond that mismatch, the description does add useful behavioral context (signals carry confidence scores and resolved tickers), but it never explains latency, freshness, or whether the tool has side effects that justify the non-read-only hint.

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 that is dense but readable; the parenthetical enumeration of source types does real work by defining the resource. It could be trimmed slightly, but no sentence is wasted.

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?

An output schema exists, so return values need not be explained. With all three parameters optional, the description gives enough domain framing for an agent to call the tool blind. The remaining gap is the unaddressed tension around readOnlyHint=false and the lack of routing guidance versus sibling signal feeds.

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 67%: ticker and precursor_type are documented in the schema (including the full enum), but limit is not described at all. The description adds no parameter-level guidance — it never says that ticker filters results, that precursor_type narrows to one taxonomy class, or how limit interacts with confidence ranking — so it does not compensate for the coverage gap. Baseline 3 applies.

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 uses a specific verb ("Retrieve") and precisely characterizes the resource: pre-event public footprints, enumerated by concrete source types (regulatory notices, pre-solicitations, Form 4 windows, hearing dockets, scheduled releases). It also states what comes back (resolved tickers, confidence scores). It doesn't explicitly contrast with near neighbors like get_upcoming_catalysts or get_policy_intelligence_feed, so it stops short of a 5.

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?

The phrase "tend to precede market-moving events" implies the use case (anticipatory/early-warning research), but there is no explicit when-to-use guidance, no exclusions, and no named alternative. An agent must infer that this is for pre-event anticipation and that get_upcoming_catalysts/get_policy_intelligence_feed cover the adjacent ground.

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