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

With no annotations at all, the description carries the full burden and does a fair job: it explains the shape of each returned item (sourceLabel, label as chip text, plus status and priority when the linker is an issue) and states that results are paginated. It omits ordering, permission requirements, and what an empty result implies.

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?

Three compact clauses, front-loaded with the core question and followed by return-shape and pagination notes. The parenthetical clarification about label being the chip text is useful and not wasteful; the description is dense but every element earns its place.

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 5-parameter tool with no annotations and no output schema, the description does the important work of explaining return fields, but leaves the two required targeting parameters and the polish/limit bounds undocumented. An agent still needs the schema to disambiguate targetType values and pagination parameters.

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. It explains the `search` parameter (filters by sourceLabel) and covers the pagination concept (page/limit) only implicitly, but says nothing about targetType's enum values or the targetId/targetType pairing required to identify the target.

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?

Opens with a specific verb+resource framing ("Backlinks: qué recursos apuntan a este objetivo"), which makes the direction of the relationship clear (incoming, not outgoing). It does not explicitly name the sibling references_outgoing to contrast with, so an agent must infer the distinction from the name and the phrase "apuntan a este objetivo".

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 only implied: you call it when you want to know which resources link to a target. There is no explicit when-to-use/when-not-to-use statement, no mention of references_outgoing as the alternative for the opposite direction, and no prerequisites stated.

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