brain_attach_url

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

The description discloses two useful behaviors beyond the name: duplicate-URL avoidance and the name-empty fallback to page title. However, since there are no annotations, it does not cover mutation side effects, permissions, error behavior, or return value, leaving a transparency gap for a write operation.

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?

The description is two sentences, front-loaded with the main action, and every clause adds useful information. There is no redundancy or filler.

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?

Core behavior and the duplicate check are explained, but the description does not mention the return value, what happens on duplicate (reject vs. silently skip), or any prerequisites like the thought/brain existing. With no output schema, these missing operational details reduce completeness.

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 75%, covering url, name, and brainId with meaningful descriptions. The tool description adds no new parameter meaning beyond what the schema already states (e.g., name empty behavior is already in the schema), and thoughtId remains undocumented.

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 uses a specific verb ('Attaches') and resource ('a link to a thought'), making the action clear. It also adds scope by mentioning duplicate-avoidance, which distinguishes it somewhat from generic linking tools, though it does not explicitly contrast with sibling tools like brain_link.

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?

The description gives no explicit guidance on when to use this tool versus alternatives such as brain_link or brain_ingest. It provides a behavioral note about duplicates and a naming hint, but no when-to-use or when-not-to-use context.

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