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

Goes well beyond readOnlyHint/openWorldHint by disclosing the shape of the answer — two directional flags, a suitability verdict, and named failure reasons (no discussion group, bot absent from it). This is genuinely useful precondition context, though it does not say what occurs for a non-existent or inaccessible route.

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?

A single front-loaded sentence that leads with the verb and subject, then nests the two directions and the blocker list in parentheticals. Dense but every clause carries information; only the stacked parentheses make it slightly harder to scan.

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?

Since there is no output schema, the description carries the burden of describing return values, and it does so with concrete fields and diagnostics. Error/edge behavior (route not found, permission issues) is the only notable 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 coverage is 100% and the single routeId parameter is fully documented in-schema, including where to obtain it (routes.list). The description adds nothing about the identifier beyond calling it 'маршрута постов', so baseline 3 applies.

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?

Names the specific resource (comment forwarding state of a post route) and enumerates exactly what it reports: the 'there' and 'back' flags, whether both route ends are Telegram/MAX channels, and blocking causes. An agent can distinguish it from route_set_comments or route_show without opening a 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?

'Звать перед включением' gives an explicit call condition — this is a pre-flight check before enabling forwarding. It stops short of naming the mutating sibling (route_set_comments / route_set_two_way) as the follow-up action, so the routing is implied rather than stated.

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