render_get_engine

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

The annotations already declare readOnlyHint=true and destructiveHint=false, so the safe-read nature is covered. The description adds just the specific 'class name' result but no additional behavioral context such as output format, possible failure modes, or relationship to the active render switch. This meets the lower bar for annotated tools but adds little beyond it.

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?

The description is extremely compact, bilingual, and front-loaded with the action and target. Every word earns its place, and there is no unnecessary filler.

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?

For a simple, parameterless, read-only getter with annotations already covering safety and no output schema, the description provides all necessary context. Nothing critical is missing for an agent to invoke this tool correctly.

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 has zero parameters and the schema is effectively complete (100% coverage with no properties). Per the baseline for zero-parameter tools, the description does not need to explain parameters; the query semantics are sufficiently clear.

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 ('return') and a specific resource ('class name of the current production renderer'). This clearly distinguishes it from the sibling render_set_engine (setter) and list_render_engines (listing available engines), so an agent can select it correctly.

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?

The description implies a query use case ('current production renderer'), and the read-only hint reinforces that. However, it does not explicitly mention when to prefer this over list_render_engines or render_set_engine, so usage guidance is only implied rather than stated.

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