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

No annotations are provided, so the description carries the burden of behavioral disclosure. It transparently reveals idempotent behavior ('If the directory already exists, this operation will succeed silently'), supports nested directory creation, and states the allowed-directory restriction. It does not cover edge cases like invalid paths or permission failures, but for a mkdir-style tool, this is substantial transparency.

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, using three sentences that front-load the main action and follow with important behavioral details. No redundant information is present; every sentence adds value, from the basic function to the idempotency and the allowed-directory constraint.

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?

Given the tool's simplicity (one parameter, no output schema, no annotations), the description is quite complete. It covers the core action, the nested-directory capability, the silent success for existing directories, and the access restriction. An agent can confidently invoke the tool based on this description alone.

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?

The input schema provides only a 'path' property with no description, and schema description coverage is 0%. The description partially compensates by implying that 'path' can include multiple nested levels ('Can create multiple nested directories in one operation') and must be within allowed directories. However, it does not explicitly explain path format (absolute vs relative) or the exact nature of the path parameter, leaving some ambiguity for a single-parameter tool.

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 the tool's function with the verb 'create' and resource 'directory', and adds the crucial nuance of 'ensure a directory exists' (idempotency). It distinguishes itself from sibling tools like write_file or delete_file by focusing on directory creation, including the ability to create nested directories.

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 provides explicit use cases: 'Perfect for setting up directory structures for projects or ensuring required paths exist.' It also includes a constraint ('Only works within allowed directories') that implicitly guides the agent to check list_allowed_directories. However, it does not explicitly mention when not to use the tool or compare it with alternatives.

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

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 adds useful context: the output format (JSON with 2-space indentation), structure details (entries include 'name', 'type', 'children'), and the constraint ('Only works within allowed directories'). However, it doesn't cover aspects like error handling, performance implications for large directories, or authentication needs.

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 appropriately sized and front-loaded: the first sentence states the core purpose, followed by details on output structure and constraints. Every sentence adds value without redundancy, making it efficient and easy to parse.

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?

Given the tool's moderate complexity (recursive tree generation), no annotations, and no output schema, the description does well by explaining the output format and structure in detail. It covers key aspects like entry fields and the 'children' array behavior. However, it could improve by mentioning potential limitations (e.g., depth limits) or error cases.

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 0%, so the description must compensate for the single parameter 'path'. While it doesn't explicitly mention the 'path' parameter, the context 'Get a recursive tree view' and 'Only works within allowed directories' implies that a path is required to specify the starting directory. This adds meaningful semantics beyond the bare schema, though it could be more direct.

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 the tool's purpose with specific verbs ('Get a recursive tree view') and resources ('files and directories'), distinguishing it from siblings like 'list_directory' (flat listing) or 'get_file_info' (single file). It precisely defines what the tool does: returns a JSON structure representing a directory tree.

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 provides clear context for usage with 'Only works within allowed directories,' indicating a constraint, and implicitly distinguishes it from siblings by specifying a recursive tree view (vs. flat listings in 'list_directory' tools). However, it lacks explicit when-not-to-use guidance or named alternatives for similar tasks.

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

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 does well by describing the edit mechanism ('replaces exact line sequences'), output format ('git-style diff'), and a key constraint ('Only works within allowed directories'). However, it lacks details on error handling, permissions needed, or whether edits are atomic/reversible, which are important 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.

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

The description is front-loaded with the core purpose in the first sentence, followed by key behavioral details and constraints in subsequent sentences. Every sentence adds value: the edit mechanism, return format, and directory restriction. There's no redundancy or wasted words.

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 mutation tool with 3 parameters, low schema coverage (33%), no annotations, and no output schema, the description does a good job covering purpose, behavior, and constraints. It explains the edit process and output format, but lacks details on error cases, permissions, or what the diff output looks like structurally. Given the complexity, it's mostly complete but has minor gaps.

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 low (33%), with only 'dryRun' having a description. The description compensates by explaining the 'edits' parameter semantics ('Each edit replaces exact line sequences with new content') and implying 'path' is for the text file. It doesn't detail 'path' format or 'edits' array structure, but adds meaningful context beyond the sparse schema.

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 the tool's purpose with specific verbs ('Make line-based edits', 'replaces exact line sequences') and resource ('to a text file'), distinguishing it from sibling tools like write_file (which presumably writes entire files) and read_file (which only reads). It also mentions the return value ('Returns a git-style diff') which further clarifies its function.

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 provides clear context for when to use this tool ('Make line-based edits to a text file') and includes an important constraint ('Only works within allowed directories'), which implicitly suggests using list_allowed_directories first. However, it doesn't explicitly state when not to use it or name alternatives (e.g., write_file for full file overwrites), keeping it from a perfect score.

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

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

With no annotations, the description carries the burden of disclosure. It states what it returns (size, creation time, permissions, type) and explicitly says it does not read content, implying a read-only behavior. It also discloses the allowed-directories restriction. However, it doesn't describe error behavior (e.g., nonexistent paths) or permission requirements, leaving minor 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 three sentences long, front-loaded with the primary purpose. Each sentence adds value: what it does, what it returns, and when/where it can be used. No redundancy or filler.

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 tool with a single parameter and no output schema, the description covers essential aspects: target type (file/directory), return details, and access restriction. It doesn't cover error handling or return format specifics, but given the tool's simplicity and the absence of annotations, it is reasonably complete.

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?

The schema provides only a 'path' string with 0% description coverage. The description adds that the target can be a file or directory and that it must be within allowed directories, which is helpful. However, it doesn't specify path format (absolute vs relative) or whether trailing slashes matter, so the compensation is partial.

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 uses a specific verb 'Retrieve' with a clear resource: 'detailed metadata about a file or directory'. It distinguishes itself from siblings like read_file (which reads content) and list_directory (which lists contents), making 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?

It explicitly states the tool is for 'understanding file characteristics without reading the actual content', implying when to use it over content-reading tools. It also mentions 'Only works within allowed directories', providing a crucial constraint. It doesn't explicitly name alternatives but the context is clear.

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

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 describes the tool's purpose and usage context but doesn't disclose behavioral traits like whether this is a cached result, if it requires specific permissions, rate limits, or what format the returned list takes. The description adds value but doesn't fully compensate for the lack of annotations.

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 perfectly concise with two sentences that each earn their place. The first sentence states the purpose, the second provides usage guidance. No wasted words, and the most important information (what the tool does) is front-loaded.

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 parameterless tool with no output schema, the description provides good context about what the tool returns and when to use it. However, it doesn't describe the return format or structure, which would be helpful given the lack of output schema. The description is mostly complete but could benefit from return value details.

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?

The tool has 0 parameters with 100% schema description coverage. The description appropriately doesn't discuss parameters since none exist. It focuses instead on the tool's purpose and usage context, which is the correct approach for a parameterless tool.

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 the tool's purpose with specific verb ('Returns') and resource ('list of root directories that this server is allowed to access'). It distinguishes itself from siblings like 'list_directory' by focusing on allowed/accessible directories rather than directory contents.

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 explicitly states when to use this tool: 'Use this to understand which directories are available before trying to access files.' This provides clear guidance that this should be used as a preliminary check before file operations, differentiating it from siblings that perform actual file operations.

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

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

With no annotations provided, the description carries the full burden. It adds useful behavioral details: results are prefixed with [FILE] and [DIR], and the tool is restricted to allowed directories. However, it omits other potentially relevant behaviors like recursion, hidden files, or error handling for invalid paths, so transparency is moderate.

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 (4 sentences) and each sentence earns its place: purpose, output format, usage context, and a critical constraint. There is no fluff or redundant information, and it is well-structured with front-loaded 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 simple tool with one parameter and no output schema, the description covers the main aspects: what it does, what results look like, and a usage constraint. It is mostly complete, though it could mention whether the listing is recursive or only immediate children, but given the tool's simplicity, it is sufficiently complete.

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?

The schema description coverage is 0% with only a single 'path' parameter. The description compensates somewhat by implying the path should be a directory ('...in a specified path') and adding the constraint about allowed directories. However, it does not clarify whether the path must be absolute, relative, or what happens for nonexistent paths, so the compensation is partial.

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 the tool's function: 'Get a detailed listing of all files and directories in a specified path.' This is a specific verb+resource that uniquely identifies the tool as a directory listing operation, distinguishing it from siblings like read_file (content) or search_files.

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 provides context on when to use the tool: 'essential for understanding directory structure and finding specific files within a directory.' It also notes the constraint 'Only works within allowed directories,' giving clear usage boundaries. It does not explicitly name alternatives, but the purpose is clear enough for an agent to choose it appropriately.

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

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 output formatting ('[FILE] and [DIR] prefixes'), access restrictions ('Only works within allowed directories'), and the inclusion of sizes. However, it doesn't mention potential limitations like pagination, error conditions for invalid paths, or performance characteristics for large directories, leaving 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.

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

The description is efficiently structured in three sentences: first states core functionality, second details output format, third provides usage context and restriction. Every sentence adds value with no redundancy or fluff, making it easy to parse and front-loaded with key information.

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 tool with 2 parameters, no annotations, and no output schema, the description does well by covering purpose, output format, usage context, and restrictions. However, it lacks details on return values (beyond prefixes), error handling, and parameter specifics, leaving some gaps given the absence of structured metadata.

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 50% (only 'sortBy' has a description), so the description must compensate. It mentions the 'path' parameter ('specified path') but doesn't explain path format or validation. It implies size information in output but doesn't connect to the 'sortBy' parameter's 'size' option. The description adds some context but doesn't fully compensate for the schema's coverage gap.

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 the verb ('Get a detailed listing') and resource ('files and directories in a specified path'), with specific output details ('including sizes', '[FILE] and [DIR] prefixes'). It distinguishes from sibling tools like 'list_directory' by specifying size inclusion and formatting, and from 'directory_tree' by focusing on flat listing rather than hierarchical structure.

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 provides clear context for when to use it ('useful for understanding directory structure and finding specific files within a directory') and includes an important exclusion ('Only works within allowed directories'). However, it doesn't explicitly compare to alternatives like 'list_directory' (which might not include sizes) or 'search_files' (for targeted searches), leaving some guidance implicit rather than explicit.

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

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 discloses key failure conditions ('If the destination exists, the operation will fail' and 'Both source and destination must be within allowed directories'), which are valuable beyond the basic move/rename semantics. It does not mention permissions or reversibility, but the disclosed behaviors are material and not redundant with schema or annotations.

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?

Three sentences, each adding value: the first states purpose, the second adds the fail-fast behavior, and the third adds the allowed-directories constraint. No fluff, front-loaded with the core action, and appropriately sized for a simple two-parameter tool.

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?

The tool is simple and has no output schema or annotations. The description covers the essential context: what the tool does, dual purpose (move/rename), failure conditions, and allowed-path constraints. It could mention what happens if source is missing or if moving directories with contents, but these are likely self-evident. Overall, it's adequately complete for this tool's complexity.

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?

The schema provides only parameter names (source, destination) with no descriptions (0% coverage). The description helps by explaining that the operation 'move[s] files between directories and rename[s] them in a single operation,' implying that 'source' is the original path and 'destination' is the target path/name. It also clarifies constraints on both parameters. This compensates for the lack of schema descriptions, though it could explicitly map the names to roles.

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 the tool's purpose: 'Move or rename files and directories.' It specifies the action (move/rename), the resource (files and directories), and distinguishes it from all sibling tools by being the only one that performs moving/renaming. The description also adds detail about moving between directories and renaming within the same directory.

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 provides clear context for when to use the tool: for moving or renaming files/directories, including moving across directories or renaming in place. It also gives important constraints: fails if destination exists, and operation limited to allowed directories. While it doesn't explicitly name alternatives, none of the sibling tools serve the same purpose, so the usage context is sufficiently clear.

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

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

With no annotations provided, the description carries full burden. It states the basic operation but doesn't disclose behavioral aspects like file size limits, encoding handling, error conditions, or performance characteristics. The deprecation warning is valuable context but doesn't cover operational behavior.

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?

Two sentences, zero waste. The first sentence states the purpose, the second provides critical deprecation guidance. Every word earns its place and the most important information (deprecation) is appropriately positioned.

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 file reading tool with 3 parameters, no annotations, and no output schema, the description is incomplete. It doesn't explain return format, error handling, or the relationship between 'complete contents' and the head/tail parameters. The deprecation warning is helpful but doesn't compensate for missing operational context.

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 67% (2 of 3 parameters described). The description mentions 'complete contents' which contradicts the optional head/tail parameters that allow partial reading. This creates confusion rather than adding semantic value beyond what the schema provides.

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 the specific action ('Read the complete contents') and resource ('a file as text'), distinguishing it from siblings like read_media_file or read_multiple_files. The deprecation notice further clarifies its relationship to read_text_file.

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 explicitly states when NOT to use this tool ('DEPRECATED: Use read_text_file instead'), providing clear alternative guidance. This directly addresses the agent's decision-making between this deprecated tool and its replacement.

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

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 adds context about the return values (base64 encoded data and MIME type) and the directory restriction, which are useful beyond basic functionality. However, it lacks details on permissions, error handling, or performance aspects, leaving gaps for a tool with no 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.

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

The description is appropriately sized with three concise sentences that are front-loaded: it states the action, return values, and constraint efficiently. Every sentence adds value without redundancy, making it easy to parse and understand quickly.

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?

Given no annotations, no output schema, and low schema coverage, the description provides basic completeness by covering purpose, returns, and a constraint. However, for a tool that reads media files, it lacks details on supported formats, size limits, or error cases, which are important for contextual understanding. It's adequate but has clear gaps.

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?

The input schema has 1 parameter with 0% description coverage, so the description must compensate. It doesn't explicitly mention the 'path' parameter or provide additional semantics beyond the directory constraint implied in the description. The baseline is 3 since the schema coverage is low, but the description adds minimal param-specific value.

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 the verb 'Read' and resource 'image or audio file', specifying the action and target. It distinguishes from siblings like 'read_file' and 'read_text_file' by focusing on media files, though it doesn't explicitly contrast them. The purpose is specific but could be more precise about sibling differentiation.

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 by stating 'Only works within allowed directories', providing some context about constraints. However, it doesn't explicitly guide when to use this tool versus alternatives like 'read_file' or 'read_text_file', nor does it mention prerequisites or exclusions beyond the directory restriction. Usage is implied but not fully articulated.

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

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 reveals key behaviors: simultaneous reading, return format (content plus path), partial failure handling ('Failed reads for individual files won't stop the entire operation'), and path restrictions ('Only works within allowed directories'). This goes well beyond the minimal and covers critical behavioral traits.

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 four sentences with no wasted words. It front-loads the core purpose, then efficiently adds efficiency rationale, return format, failure behavior, and permission scope. Every sentence earns its place.

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?

Given the tool has only one parameter, no annotations, and no output schema, the description is remarkably complete. It covers return format, failure handling, scope restrictions, and the comparative advantage over single-file reads. It leaves little ambiguity for an agent deciding when and how to invoke this tool.

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?

The schema has one parameter 'paths' with zero description coverage. The description compensates by explaining the purpose of paths indirectly ('Each file's content is returned with its path as a reference') and adds a constraint ('Only works within allowed directories'). It clarifies the parameter's role, though it does not specify path format (e.g., absolute vs relative).

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 the tool reads multiple files simultaneously, using a specific verb and resource. It distinguishes itself from the sibling 'read_file' by noting it is 'more efficient than reading files one by one', which clarifies its unique purpose.

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 provides clear usage context: 'when you need to analyze or compare multiple files'. It implies the alternative of reading files individually, but does not explicitly name 'read_file' as an alternative or specify when not to use this tool. This is clear guidance but lacks explicit exclusions or named alternatives.

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

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

With no annotations provided, the description carries full burden and does well: it discloses error handling ('provides detailed error messages'), encoding support ('Handles various text encodings'), and operational constraints ('Only works within allowed directories'). It doesn't mention performance characteristics like rate limits or file size limits, but covers core behavioral aspects adequately.

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 efficiently structured: first sentence states core purpose, second adds behavioral context, third provides usage guidance, fourth explains parameter usage, and fifth states constraints. Every sentence adds value with zero redundancy, and key information is front-loaded.

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 read operation with 3 parameters and no output schema, the description is quite complete: it covers purpose, usage, parameters, constraints, and error behavior. The main gap is lack of output format details (what the returned text looks like, encoding specifics), but given it's a text read tool, this is partially mitigated by the clear purpose statement.

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 67% (2 of 3 parameters have descriptions). The description adds significant value: it explains the purpose of 'head' and 'tail' parameters ('read only the first N lines'/'read only the last N lines'), which the schema descriptions only partially cover. However, it doesn't explain the 'path' parameter beyond what's implied, leaving some semantic gap.

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 the specific action ('Read the complete contents'), resource ('a file from the file system'), and scope ('as text'). It distinguishes from siblings like 'read_file' (which might handle binary) and 'read_multiple_files' (which handles multiple files) by specifying text-only, single-file operation.

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?

Explicit guidance is provided: 'Use this tool when you need to examine the contents of a single file.' It also distinguishes from alternatives by mentioning 'head' and 'tail' parameters for partial reading, and clarifies scope with 'Only works within allowed directories' (contrasting with unrestricted file access tools).

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

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 effectively describes key behavioral traits: recursive search through subdirectories, case-insensitive partial matching, returns full paths, and the constraint of searching only within allowed directories. It doesn't mention performance characteristics, rate limits, or error conditions, but covers the essential operational behavior well.

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 efficiently structured with 4 sentences, each adding distinct value: the core functionality, search behavior, return value, use case, and constraint. No sentence is redundant or wasted. It's appropriately sized for a search tool with 3 parameters and no annotations.

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 search tool with 3 parameters, 0% schema coverage, no annotations, and no output schema, the description does well to explain the recursive pattern matching behavior and constraints. It could benefit from mentioning the excludePatterns parameter or providing examples of pattern syntax, but covers the essential operational context adequately given the complexity.

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?

With 0% schema description coverage and 3 parameters, the description adds significant value by explaining the pattern matching behavior ('case-insensitive and matches partial names'), recursive nature ('searches through all subdirectories'), and starting point ('from the starting path'). While it doesn't explicitly name each parameter, it provides crucial context about how the pattern and path parameters work together.

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 the tool's purpose with specific verbs ('recursively search for files and directories') and resources ('files and directories matching a pattern'), distinguishing it from siblings like list_directory (non-recursive listing) or get_file_info (single file metadata). It explicitly mentions the recursive nature and pattern matching, which differentiates it from simpler listing 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?

The description provides clear context about when to use this tool ('Great for finding files when you don't know their exact location') and constraints ('Only searches within allowed directories'), but doesn't explicitly mention when NOT to use it or name specific alternatives. It implies usage vs. list_directory (which doesn't search recursively) but doesn't state this directly.

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

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 explicitly warns about destructive overwriting ('will overwrite existing files without warning'), mentions text encoding ('proper encoding'), and notes path constraints ('Only works within allowed directories'). This is strong transparency for a write tool.

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 three sentences, front-loaded with the primary action, and each sentence adds crucial information (overwrite semantics, caution, encoding, directory restriction). It is concise without being underspecified.

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 two-parameter write_file tool with no output schema and no annotations, the description provides essential context: the destructive nature, text handling, and directory restrictions. It does not mention return values or error behavior, but these are less critical for a straightforward write operation.

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?

The input schema provides no descriptions (0% coverage), so the tool description must compensate. It indirectly explains that 'content' is the new text payload and that 'path' refers to a file location subject to allowed directories, but it does not elaborate on path formats, file type restrictions, or any content size limits. Some meaning is added but not comprehensive.

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 opens with a specific verb plus resource: 'Create a new file or completely overwrite an existing file with new content.' This clearly distinguishes it from sibling render_file by emphasizing complete overwrite, and it is easy to understand exactly what the tool does.

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 when to use the tool—for creating or fully replacing files—but does not explicitly name alternatives like edit_file for partial modifications. The cautionary phrase 'Use with caution' gives some situational context, but there is no explicit when-to-use versus when-not-to-use guidance.

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