Energy flow file

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

With readOnlyHint=true already covering the safety profile, the description adds real context: it discloses the state prerequisite (page must be open) and enumerates the returned contents, which matters because there is no output schema. It doesn't say what happens if the page isn't open or whether data is scoped to the currently shown car only versus all cars.

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?

Everything is packed into a single run-on sentence with nested parentheticals, which makes the key point ('the energy flow page's data for the shown car') harder to extract. The prerequisite is front-loaded at the end rather than first, and the content enumeration could be a separate sentence.

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?

Since there's no output schema, the description carries the burden of describing return contents and does so thoroughly, plus the page-state prerequisite. Only the failure behavior when the page is not open is unaddressed.

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 tool takes no parameters, so there is nothing for the description to disambiguate beyond noting that the data is implicitly scoped to 'the car shown.' That implicit scoping is stated, which is a mild plus at the zero-parameter baseline.

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 a specific resource (the energy flow page's file, config_BEV.efl / config_PHEV.efl) and enumerates what it contains: car picture, features, flows, saved places, and preview. That distinguishes it from parallel getters like get_parking_data and get_scene_data by domain, though the word 'file' keeps the verb less explicit than it could be.

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?

It gives one clear precondition, 'Open the energy flow page first,' which is genuinely useful. It does not, however, contrast itself with the other data-fetching siblings (get_scene_data, get_parking_data, get_preview), so the agent must infer which getter applies from page context alone.

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