Server Quality Checklist

Tool Scores

• get_car_detailsA
  3.8/5.0
  Behavior3/5

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

  No annotations provided, so description carries full burden. Compensates by disclosing return data categories (specs, reviews, cancellation policy, host info), providing context for what the tool delivers. However, omits operational traits: does not state this is read-only/safe, mention rate limits, auth requirements, or caching behavior.

  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?

  Single 13-word sentence with zero waste. Front-loaded with action verb, efficiently enumerates return data categories without filler. Every word earns its place.

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

  Completeness4/5

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

  With no output schema, the description effectively compensates by enumerating the rich data returned (specs, features, reviews, etc.). For a single-parameter retrieval tool, this is functionally complete despite lacking annotations, though could benefit from explicit read-only declaration.

  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?

  Input schema has 100% description coverage for listing_id (including URL location hint), doing the heavy lifting. Description adds minimal parameter-specific semantics beyond implying the 'specific' listing constraint, warranting baseline score for high schema coverage.

  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?

  Uses specific verb 'Retrieve' with clear resource 'Turo car listing' and distinguishes from siblings: contrasts with search_cars (find vs. get details) and get_host_profile (car vs. host focus). Lists specific data categories (specs, features, reviews, cancellation policy, host info) to define scope.

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

  Usage Guidelines3/5

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

  The word 'specific' implies this requires an identifier, suggesting usage comes after discovery, but lacks explicit workflow guidance like 'Use after search_cars to get details' or 'Do not use for host-only info.' Relies on agent to infer from parameter schema.

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

• create_bookingA
  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 and successfully discloses authentication requirements and return value structure ('booking confirmation details and price breakdown'). However, it omits important behavioral traits like financial commitment implications, cancellation policies, or failure modes when vehicles are unavailable.

  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?

  Three tightly constructed sentences follow a logical progression: purpose (sentence 1), prerequisites (sentence 2), and return values (sentence 3). No redundant or filler content exists; every clause provides distinct operational context.

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

  Completeness4/5

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

  Appropriately compensates for missing output schema by describing return contents ('booking confirmation details and price breakdown') and covers the critical authentication context. Could be improved by noting the financial/destructive nature of booking creation or error handling scenarios.

  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%, with all four parameters (listing_id, start_date, end_date, message_to_host) fully documented in the input schema. The description adds no supplementary parameter guidance, meeting the baseline expectation when the schema is self-sufficient.

  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 uses specific verb 'Create' with clear resource 'car booking/reservation on Turo'. It clearly distinguishes this creation tool from siblings like search_cars (discovery), get_car_details (inspection), and manage_booking (modification of existing bookings).

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

  Usage Guidelines4/5

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

  States the critical prerequisite that 'the user [must be] logged in to their Turo account,' providing essential context for invocation. However, it does not explicitly contrast with manage_booking to clarify when to create new vs. modify existing bookings.

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

• search_carsA
  4/5.0
  Behavior3/5

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

  No annotations are provided, so the description carries the full burden. It discloses 'available' (implying real-time availability checking) and 'optional' filters, but lacks details on pagination, rate limits, authentication requirements, or error conditions (e.g., no results found).

  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?

  Single, well-structured sentence that is front-loaded with the action ('Search'). Every word earns its place—no redundancy or tautology. Efficiently communicates the core function and key parameters without waste.

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

  Completeness4/5

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

  Given the rich input schema (100% coverage, 7 parameters) and lack of output schema, the description adequately covers the input domain by mentioning required fields (location, dates) and examples of optional filters. It could be improved by briefly indicating the return value (e.g., 'returns list of available vehicles').

  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%, establishing a baseline of 3. The description adds value by grouping parameters logically (location, dates, optional filters) and specifying the Turo platform context not present in the schema, but does not elaborate on parameter formats beyond what's in the schema.

  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 uses specific verb 'Search' with clear resource 'available rental cars on Turo', and explicitly mentions the key parameters (location, dates, filters). It clearly distinguishes this as a discovery/search operation from sibling tools like create_booking or get_car_details.

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

  Usage Guidelines4/5

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

  Provides clear context that this tool is for searching with filters by location and dates, establishing it as the entry point for finding vehicles. However, it lacks explicit guidance on when to transition to siblings like get_car_details or create_booking, or when search might fail.

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

• get_host_profileA
  4.1/5.0
  Behavior3/5

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

  No annotations provided, so description carries full burden. It discloses the data scope returned (ratings, reviews, response rate, listings), which compensates partially for missing output schema. However, omits operational details like error handling (invalid host_id), pagination behavior for listings, or idempotency characteristics that annotations would typically cover.

  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?

  Single well-structured sentence with information-dense structure. Front-loaded with action verb ('View'), follows with resource identification, and concludes with specific inclusion clause. No redundant or wasted words.

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

  Completeness5/5

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

  Excellent completeness for a single-parameter tool. Compensates effectively for missing output schema by enumerating return data fields (ratings, reviews, response rate, listings). Combined with 100% parameter schema coverage, provides sufficient context for agent selection and invocation.

  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%, providing detailed guidance on host_id format and location in URLs. Description mentions 'host's profile' reinforcing the parameter purpose but does not add syntax or semantic details beyond the schema. Baseline score appropriate for high schema coverage.

  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?

  Description uses specific verb 'View' with clear resource 'Turo host's profile' and enumerates specific data returned (ratings, reviews, response rate, vehicle listings). Distinct from siblings which focus on bookings (create_booking, manage_booking), car details (get_car_details), or search (search_cars).

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

  Usage Guidelines4/5

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

  Provides clear context about the tool's function (retrieving host profile data including specific fields), allowing agents to infer when to use it (when host credibility or listing aggregation is needed). However, lacks explicit 'when not to use' guidance or direct comparison to siblings like search_cars.

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

• manage_bookingA
  4.2/5.0
  Behavior3/5

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

  With no annotations provided, the description carries full responsibility for behavioral disclosure. While it explains the three operational modes, it fails to mention critical safety aspects like whether cancellation is reversible, if modifications incur fees, or required permissions/authorization levels for these mutations.

  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 consists of exactly two sentences with zero redundancy. The first establishes scope, the second provides actionable parameter guidance—efficiently front-loaded with no wasted words.

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

  Completeness4/5

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

  Given the 100% schema coverage and clear action mapping, the description adequately covers the tool's functionality for a multi-mode operation. However, the absence of output schema and annotations leaves gaps regarding return values and side effects that the description could have partially addressed.

  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?

  Schema coverage is 100%, establishing a baseline of 3. The description adds value by explaining the semantic meaning of each action ('see booking details', 'change dates') beyond the schema's literal enumeration, though it omits mention of the optional 'message' parameter.

  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 tool performs three specific operations (view, modify, cancel) on an existing Turo booking. The phrase 'existing Turo booking' effectively distinguishes it from sibling tool create_booking.

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

  Usage Guidelines4/5

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

  The description maps each action value to its specific outcome ('view' to see details, 'cancel' to cancel, 'modify' to change dates), providing clear usage patterns. However, it lacks explicit guidance on when to choose this over create_booking or whether modifications have prerequisites.

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