Publish GIF Thread

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

The description adds the two-step flow (creates a container, then publishes) and returns a Media ID, which is useful context beyond annotations. However, annotations are minimal (readOnlyHint false, destructiveHint false) and do not cover failure modes, rate limits, or idempotency implications. The description does not disclose any potential side effects or requirements, so it only partially meets the burden.

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 concise, with a short intro and an args list. It front-loads the two-step flow, which is useful. However, the args list largely duplicates schema descriptions, adding some redundancy. Still, it is well-structured and efficient for its purpose.

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 GIF publishing tool, the description covers the essential elements: it identifies the input (GIPHY URL), the two-step mechanism, and the return value. It does not delve into prerequisites like authentication or rate limits, but given the schema and sibling context, it is adequately complete for an agent to invoke correctly. Lack of output schema is offset by the explicit return description.

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 coverage is 83%, so the baseline is 3. The description repeats parameter names and meanings that are already in the schema, adding little extra value. It does clarify the two-step flow, which indirectly explains how parameters are used, but doesn't provide syntax or format details beyond what the schema offers.

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 states it publishes a GIF post to Threads using a GIPHY URL, which is specific and distinguishes it from other Threads publishing siblings like threads_publish_image or threads_publish_video. The verb 'publishes' and resource 'GIF post' make the purpose unambiguous.

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 implies usage for GIF-specific posting but does not explicitly mention when to use this versus other publishing tools. It lacks exclusions or alternative recommendations, though the mention of 'GIPHY URL' signals the intended use case. Minimal guidance compared to the extensive sibling list.

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