get_pulse_digests

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

With no annotations, the description carries full burden and excels: it discloses cost ($0.03 via x402), payment rail (USDC on Base), settlement model (compute-first, settle-after), error guarantee (never charged for an error), and auth prerequisite/fallback (PRIVATE_KEY; 402 without key). This is exemplary for a paid tool.

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 three sentences, front-loaded with price and scope, and every sentence provides useful information. However, 'PAID $0.03 via x402' and 'Pays USDC on Base via x402' are partially redundant, and the em-dash aside could be slightly condensed.

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 paid tool with one optional parameter and no output schema, the description covers cost, auth, error behavior, and historical scope. It does not clarify what happens when `since` is omitted or detail the digest contents/return shape, but it is otherwise sufficiently complete for an agent to invoke the tool.

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?

The only parameter, `since`, is fully described in the input schema ('Return digests since this cursor/timestamp'), so schema coverage is 100%. The description adds no additional information about the cursor format or default behavior when `since` is omitted, but the baseline of 3 applies because the schema already documents it.

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?

Description clearly identifies the resource as 'Historical AI-business narrative digests' and the tool name provides the 'get' action. It indicates the temporal scope ('Historical'), which helps distinguish it from recent/latest tools, though it lacks an explicit verb like 'list' or 'fetch' and does not differentiate from siblings such as get_pulse_narratives.

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 description gives clear operational context: it costs $0.03, requires PRIVATE_KEY for live use, and returns 402 price terms without a key. However, it does not explicitly state when to prefer this tool over alternatives or mention exclusions, so usage is implied rather than directly guided.

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