Server Quality Checklist

Tool Scores

• create-postC
  2.9/5.0
  Behavior2/5

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

  No annotations are provided, so the description carries full burden. It states the tool creates a post but doesn't disclose behavioral traits like authentication requirements, rate limits, side effects (e.g., notifications), or what happens on success/failure. 'Create' implies mutation, but details are missing, leaving significant gaps for an agent.

  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, efficient sentence with zero waste. It's front-loaded with the core action and resource, making it easy to parse. Every word earns its place, and there's no redundancy or fluff.

  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 no annotations, no output schema, and a mutation tool with 2 parameters, the description is incomplete. It lacks behavioral context (e.g., permissions, effects), usage guidelines, and output details. For a creation tool, this leaves the agent under-informed about how to invoke it successfully.

  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?

  Schema description coverage is 100%, so the schema fully documents both parameters (content and imageUrl). The description adds no parameter-specific information beyond implying content is used for creation. Baseline 3 is appropriate as the schema handles semantics, but the description doesn't compensate or add value.

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

  Purpose4/5

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

  The description clearly states the action ('create') and resource ('new post'), specifying that it uses 'provided content'. It distinguishes from siblings like 'get-feed' (read) and 'reply-to-post' (interact with existing), but doesn't explicitly differentiate from 'update-username' (another mutation). The purpose is specific but could be more distinctive.

  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 on when to use this tool versus alternatives. It doesn't mention prerequisites (e.g., authentication), when not to use it, or how it relates to siblings like 'reply-to-post' for interacting with existing posts. The description assumes context without stating it.

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

• reply-to-postC
  2.9/5.0
  Behavior2/5

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

  With no annotations provided, the description carries full burden but only states the basic action without disclosing behavioral traits. It doesn't mention permissions needed, whether replies are editable/deletable, rate limits, or what happens on success/failure, leaving significant gaps for a mutation 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, efficient sentence with zero waste, front-loading the core purpose. Every word earns its place, making it appropriately sized for the tool's complexity.

  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?

  For a mutation tool with no annotations and no output schema, the description is incomplete. It lacks details on behavioral aspects, error handling, or return values, failing to compensate for the missing structured data despite the simple input schema.

  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?

  Schema description coverage is 100%, so the schema fully documents all parameters. The description adds no additional meaning beyond what's in the schema, such as explaining relationships between parameters or usage nuances, meeting the baseline for high coverage.

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

  Purpose4/5

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

  The description clearly states the action ('Create a reply') and target resource ('to an existing post'), making the purpose immediately understandable. However, it doesn't differentiate from sibling tools like 'create-post' beyond the target being a reply versus a new post, missing explicit distinction.

  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 on when to use this tool versus alternatives like 'create-post' for new posts or 'toggle-like' for interactions. The description implies usage for replying but offers no context about prerequisites, timing, or exclusions.

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

• toggle-likeC
  2.9/5.0
  Behavior2/5

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

  With no annotations provided, the description carries the full burden of behavioral disclosure. 'Like or unlike a post' implies a mutation (toggling state), but it doesn't specify permissions required, rate limits, idempotency, or what happens on success/failure. This is a significant gap for a mutation tool with zero annotation coverage.

  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, efficient sentence that directly states the tool's action without any wasted words. It is appropriately sized and front-loaded, making it easy to parse quickly.

  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 tool's complexity (a mutation with no annotations and no output schema), the description is incomplete. It lacks details on behavioral traits, error handling, and return values, which are crucial for an agent to use it correctly in context with sibling tools.

  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 schema description coverage is 100%, with the single parameter 'postId' documented as 'ID of the post to like/unlike'. The description adds no additional meaning beyond this, such as format examples or sourcing hints, so it meets the baseline for high schema coverage without compensating value.

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

  Purpose4/5

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

  The description 'Like or unlike a post' clearly states the tool's action (toggle-like) and resource (post), making the purpose understandable. However, it doesn't explicitly differentiate from sibling tools like 'reply-to-post' or 'create-post', which involve different interactions with posts, so it doesn't reach the highest score for sibling distinction.

  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?

  The description provides no guidance on when to use this tool versus alternatives. It doesn't mention prerequisites (e.g., needing a post ID from 'get-feed'), exclusions, or contextual cues, leaving usage entirely implicit based on the action name alone.

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

• update-usernameC
  2.9/5.0
  Behavior2/5

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

  No annotations are provided, so the description carries the full burden of behavioral disclosure. It states 'Update' implies a mutation, but fails to describe permissions needed, whether changes are reversible, rate limits, or what the response looks like. For a mutation tool with zero annotation coverage, this is a significant gap in transparency.

  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, efficient sentence that is front-loaded and wastes no words. It directly states the tool's purpose without unnecessary elaboration, making it highly concise and well-structured.

  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 that this is a mutation tool with no annotations and no output schema, the description is incomplete. It lacks details on behavioral traits, error handling, or return values, which are crucial for understanding how to use the tool effectively in context.

  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 description does not add any meaning beyond what the input schema provides, as schema description coverage is 100% with the parameter 'username' clearly documented. With only one parameter, the baseline is 3, as the schema adequately handles the semantics without additional description.

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

  Purpose4/5

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

  The description clearly states the action ('Update') and the resource ('the authenticated user's username'), making the purpose immediately understandable. However, it doesn't differentiate from sibling tools like 'create-post' or 'reply-to-post', which are unrelated operations, so it doesn't fully distinguish itself in context.

  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?

  The description provides no guidance on when to use this tool versus alternatives, prerequisites, or any context about its application. It lacks any mention of when-not-to-use scenarios or comparisons with other tools, leaving usage entirely implicit.

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

• get-feedB
  3.4/5.0
  Behavior3/5

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

  With no annotations provided, the description carries the full burden of behavioral disclosure. It usefully describes the return format (50 most recent posts in reverse chronological order with current topic) and implies it's a read operation. However, it doesn't mention potential limitations like rate limits, authentication requirements, or what happens if no posts exist. The description adds value but leaves gaps in behavioral understanding.

  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, efficient sentence that immediately states the tool's function and key behavioral details (quantity, ordering, additional data). Every word serves a purpose with no redundancy or unnecessary elaboration. It's perfectly front-loaded with the core purpose.

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

  Completeness3/5

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

  For a read-only tool with no parameters and no output schema, the description provides adequate but minimal information. It explains what the tool returns but doesn't describe the structure of returned posts or the 'current topic' format. Given the simplicity of the tool (no inputs, basic retrieval), the description is reasonably complete though could benefit from more detail about output format.

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

  Parameters4/5

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

  The tool has 0 parameters with 100% schema description coverage, so the schema already fully documents the lack of inputs. The description appropriately doesn't waste space discussing parameters, maintaining focus on what the tool does rather than what it accepts. This meets the baseline expectation for parameterless tools.

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

  Purpose4/5

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

  The description clearly states the tool's purpose: 'Get recent posts feed' with specific details about what it returns (50 most recent posts in reverse chronological order and the current topic). It distinguishes itself from siblings like 'create-post' or 'reply-to-post' by being a read-only retrieval operation. However, it doesn't explicitly contrast with other read operations since no other feed-related siblings exist.

  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?

  The description provides no guidance on when to use this tool versus alternatives. It doesn't mention whether this is the primary way to view posts, if there are other ways to browse content, or any prerequisites for usage. The agent must infer usage from the tool name and description alone without explicit context.

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