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

Annotations already declare destructiveHint=true, idempotentHint=true, and readOnlyHint=false, so the safety profile is covered. The description adds real value by explaining the downstream consequence for events that referenced the channel, but it omits whether removal is permanent, whether it can be restored via add_callback_channel, or what errors occur for an unknown id.

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?

Two short sentences with the operation stated first and the consequence second; nothing is wasted. The second sentence is slightly elliptical but still parses cleanly.

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 one-parameter tool with rich annotations, most of what an agent needs is present, including the effect on dependent events. However, it leaves gaps on irreversibility and on sourcing the channel_id, which matter for a destructive operation.

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% for the single channel_id parameter, so the baseline of 3 applies. The description adds nothing beyond the schema, such as where to obtain a valid channel id (list_callback_channels) or whether it must belong to this agent connection.

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 with scope ('Removes one callback channel from this agent connection'), which is unambiguous. It does not explicitly name the complementary siblings (add_callback_channel, list_callback_channels), but the operation is distinct enough that an agent can tell it apart.

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?

No guidance on when to use this versus alternatives such as add_callback_channel, verify_callback_channel, or set_callback_routing, and no prerequisites are stated. The consequence sentence ('Events that named it no longer use it') hints at effect, not at when to invoke.

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