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

Annotations already establish readOnly/idempotent/non-destructive, but the description adds real interpretive context: strategies are rule-built model portfolios, not advice, live and backtest records are reported separately, and returns exclude trading costs. Those caveats materially affect how an agent should present the data and are not derivable from annotations.

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?

Front-loaded with the return-value enumeration in the first sentence, followed by two short caveat sentences that each carry distinct information (what the product is, how live/backtest are split, cost basis). No filler or repetition.

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, the description carries the burden of describing return content, and it does so thoroughly (summary, caveats, basis, holdings with join dates and moves, dropped names, next update date, key stats). Only minor gaps remain, such as behavior for an unknown or expired slug.

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% and the single 'slug' parameter already carries examples (insider-buying, finx-stars, capitol, deep-dives), so the schema does the work. The description adds nothing about slug format or lookup behavior, which is the expected baseline-3 outcome for a one-parameter, fully documented schema.

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?

States a specific verb and resource ('Returns one Quantral strategy in detail') and enumerates exactly what the payload contains, so the agent knows this is the single-strategy detail fetch. It does not explicitly distinguish itself from the sibling get_strategy_changes, even though its 'names dropped in the latest update' / 'which are new this update' content clearly overlaps with that tool.

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?

Usage is only implied: the tool needs a slug and returns detail for one strategy, which suggests it follows list_strategies. There is no explicit when-to-use, no when-not-to-use, and no pointer to get_strategy_changes for the change-only case, which is the nearest alternative.

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