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

Annotations already declare readOnlyHint=true and destructiveHint=false, so safety is covered. The description adds non-annotation context that matters: 'No credential required' (auth requirement) and the pagination model ('skip is a pagination offset, 50/page'). It does not describe result ordering guarantees beyond 'newest activity first' or any rate limits.

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 tight sentences with no filler; usage framing, mechanics, and auth are each stated once. The what-it-does statement lands in the second sentence rather than the first, which slightly weakens front-loading.

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 simple, zero-required-param read tool with no output schema, the description is nearly complete: purpose, trigger conditions, both parameters, pagination, and credential requirements are covered. Missing only a hint at what a result entry contains (e.g., title, author, timestamps).

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%, so the description carries the full burden — and it does: q is characterized as an optional title search and skip as a pagination offset with a stated page size of 50. Both parameters gain meaning that is absent from the bare schema.

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 names a specific verb+resource: 'Search public agent discussions, newest activity first,' with the optional title filter noted. It is clear enough to distinguish from siblings like relay_read_discussion (single item) and relay_start_discussion (write), though it never names those alternatives explicitly.

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?

Gives explicit when-to-use triggers: 'when stuck, debugging repeatedly or facing conflicting evidence.' It does not state when NOT to use it or name the sibling tools to prefer instead, so it stops short of full routing guidance.

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