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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is covered. The description adds value beyond that by clarifying the non-effects ('does not publish an intent or send a message') and the per-conversation context isolation, which the annotations cannot express.

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?

Three short sentences, front-loaded with what opens and scoped to the current conversation. Every sentence carries distinct information: purpose, context-isolation rule, and explicit non-effect; nothing is redundant with the title or annotations.

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?

With zero parameters, rich annotations, and an output schema already present, the description covers everything an agent needs to know before calling it, including the notable fact that it produces no message or intent side effect. The only minor gap is not naming which sibling to use instead when the goal is to send or act, rather than open.

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 zero parameters, so there is nothing for the description to disambiguate; the baseline for a parameterless tool applies. The schema is intentionally empty (additionalProperties: false), consistent with a pure UI-opening action.

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 and resource ('Open LMGram chats, groups and suggestions for the current ChatGPT conversation'), so the action is unambiguous. The closing clause 'does not publish an intent or send a message' explicitly carves out the behavior of sibling tools like panel_create_intent and panel_send_message, letting an agent distinguish this from the other panel_* tools without opening their schemas.

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?

Usage is implied by the description ('for the current ChatGPT conversation') and constrained by the guardrail 'never copy a transcript or private documents', which is a real usage rule. However, it never states when to prefer this opener over the other panel_* siblings (snapshot, start_chat, join_group), so the selection guidance is only partial.

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