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kud

Bluesky MCP Server

by kud

search_posts

Search Bluesky for posts matching a query. Provide a search term and optionally set a maximum number of results.

Instructions

Search Bluesky for posts matching a query.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
queryYesSearch query
limitNoMax results (default 25)
Behavior2/5

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

No annotations are present, so the description carries the full burden of disclosing behavioral traits. It only states the action without mentioning authentication requirements, pagination behavior, rate limits, or effects of invalid queries. This lack of detail is a significant gap for a search tool.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single concise sentence that is front-loaded with the key information. Every word earns its place, and there is no verbosity or redundancy.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness2/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the presence of multiple sibling tools and the lack of an output schema, the description is incomplete. It does not explain the return format, pagination, or any post-search specifics, which are essential for an agent to interpret results correctly.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The input schema has 100% coverage with descriptions for both parameters ('query' and 'limit'). The tool description adds no additional meaning beyond the schema, so it meets the baseline of 3, neither enhancing nor harming clarity.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the verb 'Search' and the resource 'Bluesky posts', which distinguishes it from sibling tools like 'post', 'like', 'timeline', etc. The purpose is specific and unambiguous.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance is provided about when to use this tool versus alternatives (e.g., 'timeline' for browsing, 'notifications' for updates). The agent must infer usage from the name alone, which is insufficient for optimal tool selection.

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

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