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

Annotations already declare readOnlyHint=false, idempotentHint=true, and destructiveHint=false, so the safety profile is covered. The description adds nothing beyond that — it does not say whether removal is undoable, what happens to ids that don't exist, or whether the underlying media is affected.

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?

One short, front-loaded sentence with no wasted words, but the brevity is under-specification rather than efficiency — it conveys essentially the same information as the tool title.

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 mutation tool with an undocumented array parameter, no output schema, and no return-value or failure semantics, this description is too thin. An agent could call it but could not predict the effect or the response.

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 coverage is 50%: project_id is documented in the schema, but ids is a bare string array with no explanation. The description never clarifies that ids refer to region effect identifiers, so the ambiguous parameter remains unexplained in both structured and unstructured text.

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 pairs a verb with a resource ("Removes ... region effects"), so the general operation is clear. But it does not define what a "region effect" is or how it differs from the many other removal tools (remove_stylize, remove_screen_frame, remove_subject_effect), leaving the agent to infer scope from the name alone.

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 its apparent counterpart add_region_effect, nor on preconditions such as needing existing region effect IDs. No exclusions or alternative routing are stated.

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