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

The only annotation is readOnlyHint=false, and the description adds nothing about side effects, permissions, or reversibility even though several listed actions (channel_create, mailbox_send, task_delegate_to, refer_agent) are clearly mutating. It is at least consistent with the annotation, but with such thin annotation coverage the description should carry far more of the behavioral burden.

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, front-loaded sentences with no padding — the dispatcher nature is stated first. It is efficient, though the enumerating tail is redundant with the schema enum and consumes the space where real guidance was needed.

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 dispatcher exposing ten actions with nested, undocumented params, zero schema coverage, no output schema, and a single weak annotation, the description is far too thin to let an agent call it correctly. Nothing explains the per-action params contract, which is the single most important omission.

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 0%, and the free-form nested 'params' object — the parameter that actually determines how each action executes — is completely undocumented. The description only restates the enum already present in the schema, so it adds no meaning beyond the structured data. Without knowing each action's expected params shape, an agent cannot reliably invoke anything but the trivial actions.

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 gives a concrete verb+resource pattern ('Perform one registered action') and enumerates the ten action values, so an agent understands this is a generic action dispatcher. However, it never differentiates the tool from siblings with overlapping surface area (mailbox_read vs waystation_read, mailbox_send vs waystation_post, task_delegate_to vs waystation_handoff_put), and 'registered action' is unexplained jargon.

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 when-to-use guidance: no explanation of when to route through this dispatcher versus calling a dedicated sibling, no prerequisites, and no note about which action is appropriate in which situation. The action-value list reads as a scope inventory, not usage guidance.

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