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Server Details

QR Code MCP — wraps api.qrserver.com (free, no auth)

Status
Healthy
Last Tested
Transport
Streamable HTTP
URL
Repository
pipeworx-io/mcp-qrcode
GitHub Stars
0

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Tool DescriptionsA

Average 4.1/5 across 7 of 7 tools scored. Lowest: 2.9/5.

Server CoherenceB
Disambiguation3/5

The tools have some clear distinctions, such as create_qr and read_qr for QR code operations, but there is significant overlap and confusion between ask_pipeworx and discover_tools, as both involve finding or using tools based on descriptions. Additionally, the memory tools (remember, recall, forget) are distinct from the QR tools, but the overall set mixes unrelated domains, leading to potential misselection.

Naming Consistency4/5

Most tools follow a consistent verb-based naming pattern (e.g., create_qr, read_qr, discover_tools, forget, recall, remember), with clear actions. However, ask_pipeworx deviates slightly by using 'ask' as a verb with a brand name, which is a minor inconsistency but doesn't severely disrupt readability.

Tool Count3/5

With 7 tools, the count is reasonable, but it feels borderline due to the mixed purposes: QR code tools (2 tools), memory management (3 tools), and tool discovery/querying (2 tools). This suggests the server might be trying to cover too many unrelated domains, making the scope unclear and potentially overextended for a server named 'qrcode'.

Completeness2/5

For a server named 'qrcode', the QR code domain is incomplete with only create and read operations, lacking features like customization or error correction. The inclusion of unrelated tools (e.g., memory management and tool discovery) creates significant gaps in the core domain coverage, as these do not align with the server's apparent purpose, leading to potential agent failures in focused tasks.

Available Tools

7 tools
ask_pipeworxAInspect

Ask a question in plain English and get an answer from the best available data source. Pipeworx picks the right tool, fills the arguments, and returns the result. No need to browse tools or learn schemas — just describe what you need. Examples: "What is the US trade deficit with China?", "Look up adverse events for ozempic", "Get Apple's latest 10-K filing".

ParametersJSON Schema
NameRequiredDescriptionDefault
questionYesYour question or request in natural language
Behavior4/5

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

With no annotations provided, the description carries full burden. It discloses key behavioral traits: the tool picks the right data source and fills arguments automatically, handles natural language questions, and returns results. However, it doesn't mention limitations like rate limits, authentication needs, or error handling, leaving some gaps 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 front-loaded with the core functionality, followed by supporting details and examples. Every sentence earns its place: the first defines the tool, the second explains the automation, the third provides usage guidance, and the examples illustrate practical applications. 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 tool's complexity (natural language processing to select data sources) and lack of annotations/output schema, the description does well by explaining the automation process and providing examples. However, it doesn't detail return formats or potential limitations, which could be important for an agent to use it effectively.

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 input schema has 100% description coverage, so the baseline is 3. The description adds value by explaining the parameter's purpose: 'Your question or request in natural language' and providing concrete examples ('What is the US trade deficit with China?', etc.). This enhances understanding beyond the schema's basic description.

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's purpose: 'Ask a question in plain English and get an answer from the best available data source.' It specifies the verb ('ask'), resource ('answer from data source'), and distinguishes from siblings by emphasizing natural language input without needing to browse tools or learn schemas. The examples further clarify the scope.

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

Usage Guidelines5/5

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: 'No need to browse tools or learn schemas — just describe what you need.' This contrasts with sibling tools like 'discover_tools' or 'recall' by positioning it as a high-level query interface. It provides clear alternatives (implied: use other tools for specific structured operations).

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

create_qrAInspect

Generate a scannable QR code from text or URLs. Returns an image URL ready to embed or download. Use when you need to encode information into a QR code.

ParametersJSON Schema
NameRequiredDescriptionDefault
dataYesThe text or URL to encode in the QR code.
sizeNoWidth and height of the QR code image in pixels (default 200).
Behavior4/5

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 by disclosing key behavioral traits: it generates QR codes, returns an image URL (not the image itself), and specifies how to use the URL. It doesn't mention rate limits, authentication needs, or error conditions, but covers the core operational behavior adequately for a simple 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?

Two sentences with zero waste: the first states the purpose and output, the second explains how to use the output. Every word earns its place, and the description is appropriately sized for this simple tool.

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?

For a simple QR code generation tool with no annotations, no output schema, and good schema coverage, the description is nearly complete. It explains what the tool does, what it returns, and how to use the return value. The main gap is lack of explicit guidance versus the sibling tool 'read_qr', but otherwise it provides sufficient 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?

Schema description coverage is 100%, so the schema already documents both parameters thoroughly. The description adds no additional parameter information beyond what's in the schema (e.g., it doesn't explain 'data' or 'size' further). Baseline 3 is appropriate when the schema does the heavy lifting.

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 specific action ('Generate a QR code') and resource ('any text or URL'), distinguishing it from the sibling tool 'read_qr' which presumably reads/decodes QR codes rather than creating them. The verb+resource combination is precise 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 Guidelines3/5

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

The description implies usage context by mentioning what the tool returns ('Returns the image URL') and how to use the output ('embedded directly in an <img> tag or downloaded'), but doesn't explicitly state when to use this tool versus alternatives or any prerequisites. The existence of 'read_qr' as a sibling suggests this is for creation while that is for reading, but this distinction isn't made explicit in the description.

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

discover_toolsAInspect

Search the Pipeworx tool catalog by describing what you need. Returns the most relevant tools with names and descriptions. Call this FIRST when you have 500+ tools available and need to find the right ones for your task.

ParametersJSON Schema
NameRequiredDescriptionDefault
limitNoMaximum number of tools to return (default 20, max 50)
queryYesNatural language description of what you want to do (e.g., "analyze housing market trends", "look up FDA drug approvals", "find trade data between countries")
Behavior4/5

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 effectively describes the tool's behavior: it's a search operation that returns 'the most relevant tools with names and descriptions.' It doesn't mention rate limits, authentication needs, or error conditions, but for a read-only discovery tool, the description provides adequate behavioral context.

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 perfectly concise and well-structured: two sentences that each earn their place. The first sentence states the core functionality, the second provides crucial usage guidance. There's zero wasted text, and the most important information ('Call this FIRST') is appropriately front-loaded.

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?

For a search/discovery tool with no annotations and no output schema, the description provides good context about when to use it and what it returns. However, it doesn't describe the format of returned results or potential limitations (beyond the 500+ tools context). Given the tool's relative simplicity and good parameter coverage, this is mostly complete but could mention output format.

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?

With 100% schema description coverage, the input schema already documents both parameters thoroughly. The description adds no additional parameter semantics beyond what's in the schema. The baseline score of 3 is appropriate when the schema does the heavy lifting for parameter documentation.

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's purpose with specific verbs ('Search the Pipeworx tool catalog') and resources ('tool catalog'), and explicitly distinguishes it from siblings by emphasizing its role in discovery among '500+ tools available' - a context not relevant to the listed sibling tools (create_qr, read_qr).

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

Usage Guidelines5/5

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

The description provides explicit usage guidance: 'Call this FIRST when you have 500+ tools available and need to find the right ones for your task.' This gives clear conditions for when to use it (large catalog, discovery needed) and implicitly suggests alternatives (direct tool invocation) when those conditions aren't met.

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

forgetCInspect

Delete a stored memory by key.

ParametersJSON Schema
NameRequiredDescriptionDefault
keyYesMemory key to delete
Behavior2/5

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

With no annotations provided, the description carries full burden for behavioral disclosure. While 'Delete' implies a destructive operation, it doesn't specify whether deletion is permanent, reversible, requires specific permissions, or has side effects. For a destructive tool with zero annotation coverage, this is insufficient behavioral context.

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 communicates the core functionality without any wasted words. It's appropriately sized for a simple deletion tool and is front-loaded with the essential information.

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 destructive operation tool with no annotations and no output schema, the description is incomplete. It doesn't address what happens after deletion, whether there are confirmation requirements, what errors might occur, or how this tool relates to sibling memory operations. The minimal description leaves significant gaps in understanding.

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 'key' clearly documented as 'Memory key to delete'. The description adds no additional parameter information beyond what's already in the schema, so it meets but doesn't exceed the baseline expectation for tools with complete schema documentation.

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 ('Delete') and resource ('a stored memory by key'), making the purpose immediately understandable. However, it doesn't differentiate this tool from potential siblings like 'recall' or 'remember' that might also interact with stored memories, preventing a perfect score.

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. With siblings like 'recall' and 'remember' that likely interact with stored memories, there's no indication of when deletion is appropriate versus retrieval or creation, leaving the agent without contextual usage information.

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

read_qrAInspect

Decode QR code images to extract embedded text or URLs. Returns the decoded content. Use when you need to read what's stored in a QR code.

ParametersJSON Schema
NameRequiredDescriptionDefault
urlYesPublicly accessible URL of the QR code image to decode.
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 states the tool decodes QR codes and returns text, which covers the basic operation, but lacks details on error handling (e.g., invalid URLs, non-QR images), rate limits, or authentication needs. It adds some value but not rich behavioral context.

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 front-loads the purpose ('Decode a QR code') and includes key details (source and output) without any wasted words. Every part of the sentence earns its place, 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.

Completeness4/5

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

Given the tool's low complexity (one parameter, no output schema, no annotations), the description is mostly complete: it states the action, input requirement, and output. However, it could be more complete by addressing potential errors or constraints, slightly lowering the score from 5.

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% description coverage, with the 'url' parameter fully documented in the schema itself. The description mentions 'publicly accessible image URL,' which aligns with the schema but does not add significant meaning beyond it. Baseline 3 is appropriate when the schema does the heavy lifting.

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 specific action ('Decode a QR code') and resource ('from a publicly accessible image URL'), with the verb 'Decode' distinguishing it from the sibling tool 'create_qr' which presumably creates QR codes. It precisely communicates what the tool does without being vague or tautological.

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 provides clear context for when to use this tool: when you have a publicly accessible image URL containing a QR code that needs decoding. However, it does not explicitly mention when not to use it or name alternatives (e.g., using 'create_qr' for generation instead), which prevents a score of 5.

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

recallAInspect

Retrieve a previously stored memory by key, or list all stored memories (omit key). Use this to retrieve context you saved earlier in the session or in previous sessions.

ParametersJSON Schema
NameRequiredDescriptionDefault
keyNoMemory key to retrieve (omit to list all keys)
Behavior4/5

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

With no annotations, the description carries full burden and does well by disclosing key behaviors: it retrieves stored memories, supports listing all keys when key is omitted, and works across sessions. It doesn't mention error handling or performance limits, but covers core functionality adequately.

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?

Two sentences, front-loaded with core functionality and followed by usage context. Every word earns its place: no redundancy, clear structure, and efficient communication of key information.

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?

For a simple tool with one parameter and no output schema, the description is nearly complete: it explains purpose, usage, and parameter semantics. It lacks details on return format or error cases, but given low complexity, this is sufficient for effective use.

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 schema has 100% coverage for the single parameter, so baseline is 3. The description adds value by explaining the semantic effect of omitting the key ('omit to list all keys'), which clarifies the tool's dual behavior beyond the schema's technical description.

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's purpose with specific verbs ('retrieve', 'list') and resources ('previously stored memory', 'all stored memories'). It distinguishes from siblings by mentioning retrieval of saved context, unlike tools like 'remember' (store) or 'forget' (delete).

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

Usage Guidelines5/5

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

It provides explicit guidance on when to use this tool: 'to retrieve context you saved earlier in the session or in previous sessions'. It also specifies when to omit the key parameter ('omit key to list all keys'), offering clear usage rules without alternatives needed here.

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

rememberAInspect

Store a key-value pair in your session memory. Use this to save intermediate findings, user preferences, or context across tool calls. Authenticated users get persistent memory; anonymous sessions last 24 hours.

ParametersJSON Schema
NameRequiredDescriptionDefault
keyYesMemory key (e.g., "subject_property", "target_ticker", "user_preference")
valueYesValue to store (any text — findings, addresses, preferences, notes)
Behavior4/5

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 effectively describes key behavioral traits: the tool performs a write operation ('Store'), specifies persistence differences ('Authenticated users get persistent memory; anonymous sessions last 24 hours'), and implies it's for session-scoped data. However, it doesn't mention potential limitations like storage size, rate limits, or error conditions, which would be helpful 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 appropriately sized and front-loaded, with two sentences that efficiently convey purpose, usage, and behavioral details without waste. Every sentence adds value: the first defines the core function, and the second adds critical context about persistence. No redundant or vague phrasing is present.

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 tool's moderate complexity (a write operation with persistence nuances), no annotations, and no output schema, the description is largely complete. It covers purpose, usage, and key behavioral aspects like authentication differences. However, it lacks details on return values or error handling, which would be beneficial since there's no output schema to compensate.

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 both parameters ('key' and 'value') well-documented in the schema. The description adds minimal semantic value beyond the schema—it mentions what can be stored ('findings, addresses, preferences, notes') but doesn't provide additional syntax, constraints, or examples. This meets the baseline of 3 when the schema does the heavy lifting.

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's purpose with specific verbs ('Store a key-value pair') and resource ('in your session memory'), distinguishing it from siblings like 'recall' (likely for retrieval) and 'forget' (likely for deletion). It explicitly mentions what can be stored ('intermediate findings, user preferences, or context across tool calls'), 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.

Usage Guidelines4/5

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 ('to save intermediate findings, user preferences, or context across tool calls'), but does not explicitly state when not to use it or name alternatives. For example, it doesn't clarify if 'recall' is the complementary retrieval tool or how it differs from other storage mechanisms, leaving some usage decisions implicit.

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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