grafana_renderizar_painel

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

No annotations are provided, so the description carries the full behavioral burden. It mentions the Image Renderer as the mechanism, which is useful context, but says nothing about required permissions, render timeouts/failures, or size constraints of the returned image.

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 front-loaded sentence with no padding, but the leading '77.' counter is noise and the brevity is under-specification rather than genuine economy.

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?

An output schema exists, so return-value explanation is not required, but for a tool with 6 parameters at 0% schema coverage and no annotations the description leaves out the time-range syntax, dimension semantics, and the Image Renderer dependency's operational implications.

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 0% and the description supplies no parameter meaning at all. The six parameters (including the from/to time range and width/height defaults) are only labeled with bare Portuguese titles, leaving the agent to guess formats such as the 'now-6h' time syntax.

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+resource: render a PNG image of an individual Grafana panel via the Image Renderer. The word 'individual' implicitly separates it from grafana_renderizar_dashboard, but the differentiation is not made explicit.

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 guidance on when to use this versus grafana_obter_painel (which returns panel definition) or grafana_renderizar_dashboard (full dashboard image), nor any prerequisites such as the Image Renderer plugin needing to be installed. Only the implied 'you want a picture' use case is conveyed.

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