configure_plugin_setting

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

Annotations already declare readOnlyHint=false, destructiveHint=true, and idempotentHint=true, and the description is consistent with them. Beyond that it adds real context: the write lands in the Saved/Config user layer rather than the versioned ini, and the operation verifies itself via a GConfig read-back, succeeding only on a match. It stops short of naming permission or rate-limit considerations, so a 4 rather than a 5.

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 operational sentence is front-loaded and dense with the right information (destination, verification, failure, alternative), and the description ends by naming the alternative tool. The Returns block, while long, is carrying weight because there is no output schema. Only the sheer length of the 18-field return enumeration costs a point.

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 mutating tool with no output schema, the description covers destination layer, readback verification, failure semantics, and enumerates the return fields, which is the important compensation. Minor gaps remain (behavior on pre-existing keys, whether other settings in the section are affected), keeping it at 4 rather than 5.

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%, with the optional section default ('/Script/<Plugin>.<Plugin>') documented in the schema itself, so the baseline is 3. The description clarifies the overall key=value/config-section model but adds no per-parameter format or syntax detail beyond the 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+resource+destination: writes one key=value under a plugin config section through GConfig into GEngineIni, explicitly contrasted with the versioned Config/DefaultEngine.ini. It also names the sibling to use instead (set_project_settings_value), so an agent can route without opening either schema.

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?

Explicitly routes the alternative case ('For versioned settings use set_project_settings_value') and gives the failure condition ('an unknown plugin fails without writing anything'). This is exactly the when-to-use / when-not-to-use guidance the dimension asks for.

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