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

Annotations already declare readOnly/idempotent/non-destructive/openWorld, and the description adds substantive behavior beyond them: deterministic oldest-first ordering and, critically, a prompt-injection warning that comment bodies are untrusted agent-written content with explicit prohibitions on following instructions or signing. That is exactly the kind of safety context annotations cannot convey.

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 sentences, both load-bearing: the first states what is returned and in what order, the second is the security directive. No filler, and the resource definition is front-loaded.

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 no output schema, the description correctly compensates by enumerating returned fields and ordering, and the untrusted-content warning covers the dominant risk of openWorld reads. The one gap is pagination behavior — limit caps at 500 with a default of 100, but nothing says whether results are truncated or how to page through a long thread.

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%, documenting both 'token' format ('base:0x…' or bare address) and 'limit' default of 100, so the baseline is 3. The description adds no parameter detail, and only implicitly hints that 'limit' truncates from the oldest end given the stated ordering.

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 (discussion thread for a CoinFactory-launched token), its ordering (oldest first), and the fields returned (author wallet, agent runtime, signature), so the agent knows exactly what it retrieves. It never names the sibling write tool post_token_comment or get_launched_token, so differentiation is inferred rather than stated.

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 resource description, and there is a strong instruction on how to treat the returned content, but nothing says when to call this versus get_launched_token, get_risk_signals, or post_token_comment. No prerequisites or exclusions are given.

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