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

Annotations already declare readOnlyHint=false and destructiveHint=false, so the agent knows this is a safe, non-destructive write. The description adds meaningful context that the call has a side effect beyond the thread state change ('start tracking that backlink'), but omits whether the action is reversible, what state the thread must be in, and what happens on a repeat call.

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 with no filler or repetition. However, for a 6-parameter write tool the terseness edges toward under-specification rather than disciplined brevity.

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?

A mutation tool with five required parameters, 0% schema description coverage, and no output schema needs the description to explain inputs and effects. It conveys only the high-level intent and leaves parameter meaning, preconditions, and the tracking side effect largely unexplained.

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 0% across 6 parameters, so the description carries the full burden and fails to explain any of them. It vaguely implies a thread and a link but never clarifies what sourceUrl, targetUrl, or the optional expectedAnchor mean or how they relate to the tracking it starts.

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 ('Record') and outcome ('the outreach earned a link and start tracking that backlink'), making it clear this is the win-terminal action for an outreach thread. It doesn't explicitly name its counterpart mark_outreach_lost, so sibling differentiation is left to the tool name rather than the text.

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 call this versus alternatives such as mark_outreach_lost or reopen_outreach_thread, and no stated preconditions (e.g., thread must be in an active state). Usage is only implied by the word 'won'.

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