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

With no annotations, the description carries the full disclosure burden. It does add one genuinely useful behavioral fact not in the schema: the call costs $0.005 USDC on Base (the schema only names a paymentSignature field, not that payment is metered or what happens on an unpaid call). Beyond that it is silent on read-only semantics, whether an unpaid request returns a 402 challenge, error behavior, or data freshness/latency for 'live' values.

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 dense sentence with the core payload front-loaded and zero filler. It is jargon-heavy (FVG, Silver Bullet, triple-swap) but each term names a distinct data product rather than restating the name.

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?

With no output schema and no annotations, the description does the minimum: it lists the categories of data returned. It does not describe the response shape, timestamp/timezone formatting, whether all four categories are always present, or the payment flow. Adequate to decide whether to call, but not to call it confidently.

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 100%, so the schema already explains both `at` (ISO-8601 UTC, defaults to now) and `paymentSignature`. The description reinforces the live-default behavior but adds no format, range, or historical-lookup semantics beyond what the schema states. 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 ('Get') and then enumerates the exact resources returned: ICT Killzones by session name, 60m Silver Bullet FVG windows, CFD rollover spread alerts, and triple-swap flags. An agent knows precisely what data it gets. It does not differentiate itself from the adjacent sibling get_cfd_microstructure, which likely overlaps on spread/rollover content, 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?

There is no when-to-use guidance, no statement of preconditions, and no naming of alternatives or exclusions. Nothing tells the agent when to prefer this over get_cfd_microstructure or calculate_prop_firm_risk, nor when a historical 'at' lookup is appropriate versus the live default.

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