Are.na channel contents

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

With no annotations, the description carries the behavioral burden. It discloses that results are paginated and that blocks include image URLs, which is useful context. However, it does not describe the full response shape, ordering, or any access considerations, leaving meaningful gaps.

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 short sentences with no filler. It front-loads the core purpose, mentions pagination, and gives the primary usage context, making efficient use of the space.

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 paginated list-by-id tool, the description gives enough to understand the basic operation and how it fits after arena_search. However, with no output schema and no annotation support, the agent is left without a clear picture of the return structure and full pagination behavior, so completeness is only moderate.

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 only 33%, and the description adds no parameter-level meaning. The id parameter is documented in the schema as 'channel slug or id', but per and page have no explanation in either place, and the description's mention of pagination does not compensate for the missing semantics.

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 clearly identifies the resource as blocks inside a channel, with image URLs, and contrasts it with the search step (arena_search). It lacks an explicit verb like 'list' or 'retrieve', but the meaning is still unambiguous and distinguishable from the sibling tools.

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?

It gives explicit guidance to use this tool after arena_search to expand a collection, which helps an agent know when it fits in a workflow. It does not state when not to use it or mention the other sibling alternatives, but the primary usage context is clear.

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