shorten_urls

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

Annotations already declare readOnlyHint=false, destructiveHint=false and openWorldHint=true, so the write/non-destructive profile is covered. Beyond that the description adds no behavioral context: no maximum batch size, no behavior for duplicate slugs, no note on what happens on partial failure, and no output information (no output schema exists).

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 short front-loaded sentences with no filler; the core action is stated first and the parameter hint second. The brevity comes at the cost of detail, but the structure itself is clean.

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 bulk mutation tool with a nested item object, no output schema, and 0% schema coverage, the description omits critical call-time information: the required destination field, batch limits, and failure semantics. It is not sufficient for an agent to invoke this confidently.

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 must compensate, and it only partially does. It names 'slug' and the 'utm_*' fields, but omits 'destination' — the sole required field in each item — and gives no format hints for slug or the array structure.

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 and resource ('Bulk-create short URLs'), and the word 'Bulk' implicitly separates it from the singular shorten_url sibling. It does not name the sibling outright, but an agent can infer the distinction from the plural name and 'Bulk' qualifier.

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 word 'Bulk' implies this is the tool for multiple URLs while shorten_url handles one, but the description never states when to prefer this over the sibling, whether there is a batch-size limit, or whether partial failures are tolerated. Usage is only implied, not guided.

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