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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and openWorldHint, so the safety profile is covered. The description adds two things the annotations do not: the per-call credit cost (0.3 points) and the fixed 90-day lookback window on the calendar, both of which affect invocation decisions. It omits any note on rate limits or why a 'point' cost applies.

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 compact clause, front-loaded with the resource identity followed by the returned components and the cost in parentheses. Nothing is repeated and nothing 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?

With no output schema, the description reasonably carries the burden of listing returned components, and it does so. But it leaves two gaps that matter for a tool in this dense a sibling set: how 'sectors_stock' differs from the plural 'sectors_stocks', and what 'tracked assets' means concretely. Adequate but incomplete.

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 both parameters ('sector' slug, 'ticker') are documented in the schema itself, so the baseline of 3 applies. The description adds no format details — e.g. whether the sector slug must come from list_sectors, or whether the ticker is exchange-qualified.

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 names the resource precisely — a single company within a sector — and enumerates what the call returns (profile, tracked assets, calendar, events, market-cap peers). That is enough to separate it from get_sector (whole sector) and sectors_assets. It stops short of an explicit verb, so it reads more like a content manifest than a 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 when-to-use guidance and no named alternative, which matters because the sibling list contains sectors_stocks, sectors_asset, sectors_assets, and sectors_event — names close enough that an agent has no stated basis for choosing this one. The '0.3 points per call' note implicitly tells the agent this is not free, but never says when to prefer a cheaper sibling.

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