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

With no annotations, the description carries the full behavioral burden, and it does disclose one useful non-schema fact: the API returns the saved object with an id. However, it is silent on permission requirements (the schema alone notes pub_ keys are read-only), duplicate handling, and error behavior for a mutation.

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 tight sentences with the core action first and the return-value note second; nothing is wasted and the terminology ('record', 'collection', 'data') matches the schema keys.

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 3-parameter create tool with full schema coverage and no output schema, the description covers purpose, payload, and return value, which is close to sufficient. It leaves auth/permission and duplicate-handling gaps, but those are modest given the schema's api_key documentation.

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%, so api_key, collection, and data are already documented in the schema. 'Pass the fields as data' merely restates the data parameter without adding format or constraint detail beyond what the schema provides; 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?

The description uses a specific verb and resource ('Save a record ... in a collection') and clarifies the payload shape ('a JSON object'), so an agent can distinguish it from list_records or update_record. It falls short of 5 because it never names the sibling tools it differs from.

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?

There is no statement of when to use this tool versus create_collection, create_project, or update_record, nor any prerequisite or deduplication guidance. 'So it persists' hints at intent but gives no routing condition between the create-family siblings.

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