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Server Details

Mailchimp MCP Pack — manage audiences, campaigns, and members via Mailchimp Marketing API.

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

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MCP client
Glama
MCP server

Full call logging

Every tool call is logged with complete inputs and outputs, so you can debug issues and audit what your agents are doing.

Tool access control

Enable or disable individual tools per connector, so you decide what your agents can and cannot do.

Managed credentials

Glama handles OAuth flows, token storage, and automatic rotation, so credentials never expire on your clients.

Usage analytics

See which tools your agents call, how often, and when, so you can understand usage patterns and catch anomalies.

100% free. Your data is private.
Tool DescriptionsA

Average 3.9/5 across 10 of 10 tools scored. Lowest: 2.9/5.

Server CoherenceA
Disambiguation4/5

Most tools are clearly distinct, with Mailchimp tools targeting different resources (audiences, campaigns, members) and memory/query tools having separate purposes. However, 'ask_pipeworx' and 'discover_tools' both involve finding information, potentially causing some confusion.

Naming Consistency3/5

Mailchimp tools use a consistent 'mailchimp_{verb}_{noun}' pattern, but memory tools use different verbs ('forget', 'recall', 'remember') and 'ask_pipeworx' and 'discover_tools' break the pattern entirely, mixing conventions.

Tool Count5/5

10 tools is well-scoped for a Mailchimp integration that includes audience, campaign, and member management plus memory/query utilities. Each tool has a clear role, and the count feels appropriate.

Completeness3/5

The Mailchimp subset covers basic read and list operations but lacks create, update, or delete actions for audiences, campaigns, or members, which would be needed for full lifecycle management. Memory tools are complete, but the domain feels incomplete.

Available Tools

10 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
Behavior5/5

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

Description fully discloses that Pipeworx selects the right tool, fills arguments, and returns results. No annotations provided, so description carries full burden and does so effectively.

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 concise sentences front-loaded with purpose, followed by examples. Every sentence adds value.

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?

Description is complete for a single-param tool with no output schema; it explains behavior and usage. Minor gap: no mention of limitations or error handling, but acceptable given simplicity.

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%, and description adds context on how to use the single parameter ('describe what you need') with examples, going beyond the schema's minimal 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?

Description uses specific verbs ('ask', 'picks', 'fills', 'returns') and clearly states the tool answers natural language questions by selecting the best data source. It distinguishes from siblings by acting as a meta-tool that abstracts away other tools.

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?

Description explicitly says to describe needs in plain English and provides examples. However, no guidance on when not to use or alternatives, but the tool is designed to be the primary entry point.

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?

The description reveals that the tool searches by natural language, returns relevant tools with names and descriptions, and is intended for discovery. Without annotations, this is sufficient, though it could mention that it does not execute tools or provide detailed usage beyond search results.

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 sentences: first states the purpose, second adds return value details, third gives explicit usage guidance. No fluff, front-loaded with key action.

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?

For a search/discovery tool with no output schema, the description is complete: it explains what it does, what it returns, and when to use it. With 2 parameters and simple behavior, no additional context is needed.

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 description provides a natural language query example for the 'query' parameter, adding context beyond the schema description. The 'limit' parameter is only mentioned in the schema; the description does not add extra meaning, but schema coverage is 100%, so baseline is 3. The example earns an extra point.

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

Purpose5/5

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

The description clearly states the verb 'Search', the resource 'Pipeworx tool catalog', and the specific behavior 'by describing what you need'. It also distinguishes the tool from siblings by recommending it as a first step when many tools are available.

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 says 'Call this FIRST when you have 500+ tools available and need to find the right ones for your task', providing clear guidance on when to use it and its role in a workflow.

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

forgetAInspect

Delete a stored memory by key.

ParametersJSON Schema
NameRequiredDescriptionDefault
keyYesMemory key to delete
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 states 'delete' which implies destructive action, but does not disclose whether deletion is irreversible, cascading effects, or required permissions. Adequate for a simple key-based delete.

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 sentence, minimal and direct. 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 simplicity (one required parameter, no output schema), the description is nearly complete. It explains what it does and how to specify the memory. Could mention if the key is case-sensitive or if it returns confirmation.

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 coverage is 100% with a single required parameter 'key' described as 'Memory key to delete'. The description does not add new semantics beyond the schema, so baseline 3 is appropriate.

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

Purpose5/5

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

The description clearly states the verb 'delete' and the resource 'stored memory', with 'by key' specifying the identifier. It distinguishes itself from sibling tools like 'remember' (store) and 'recall' (retrieve).

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?

No explicit when-to-use or alternatives provided. The tool name and description imply a simple deletion action, but without context on when to forget versus other memory operations, guidance is implied.

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

mailchimp_get_audienceCInspect

Get detailed settings and stats for a specific audience. Pass the audience ID (e.g., "abc123def456"). Returns name, member count, engagement metrics, and configuration.

ParametersJSON Schema
NameRequiredDescriptionDefault
_apiKeyYesMailchimp API key
list_idYesAudience/list ID
Behavior2/5

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

No annotations provided, so description must disclose behavior. It states it returns name, stats, and settings, but does not mention whether it is read-only, any rate limits, or error conditions. The mutation intent is not clear (read operation implied but not explicit).

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

Conciseness4/5

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

One sentence with key information. No fluff, but could include more details on return format without becoming too long.

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

Completeness2/5

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

Given no output schema and no annotations, the description is incomplete. It does not explain the structure of the returned details, pagination, or error handling. For a tool with only 2 parameters, it should provide more context about what is returned.

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 coverage is 100%, so parameters are documented. The description adds no extra meaning beyond the schema; it simply says 'by ID' which matches the list_id parameter.

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 it gets details of a Mailchimp audience by ID, specifying return fields (name, stats, settings). This distinguishes it from sibling tools like mailchimp_list_audiences which lists all audiences.

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

Usage Guidelines2/5

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

No guidance on when to use this tool vs alternatives like mailchimp_list_audiences. No mention of prerequisites (e.g., needing to have list_id from list operation).

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

mailchimp_get_campaignBInspect

Get full details of a campaign by ID (e.g., "abc123def456"). Returns settings, tracking configuration, performance stats, and send history.

ParametersJSON Schema
NameRequiredDescriptionDefault
_apiKeyYesMailchimp API key
campaign_idYesCampaign ID
Behavior3/5

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

Annotations are empty, so description carries the burden. It states it returns 'campaign settings, tracking, and report summary', which gives some behavioral insight into what fields are returned. However, it doesn't disclose side effects (likely none), authentication requirements beyond the apiKey parameter, or any rate limits. With no annotations, a score of 3 is adequate but not thorough.

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: the first states the purpose and the second lists return contents. No wasted words. Front-loaded with the core action.

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 (2 parameters, no output schema, no nested objects), the description is reasonably complete. It explains what it gets and the categories of returned data. Could be improved by noting that it requires a valid campaign_id from mailchimp_list_campaigns.

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 coverage is 100% with descriptions for both parameters ('Mailchimp API key' and 'Campaign ID'). The description adds no additional meaning beyond what the schema provides. Baseline 3 is appropriate when schema already documents parameters well.

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 'Get details of a specific Mailchimp campaign by ID', which is a specific verb ('Get') and resource ('campaign details'). It distinguishes from siblings like mailchimp_list_campaigns (list vs. get) and mailchimp_get_audience (different resource).

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

Usage Guidelines2/5

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

No explicit guidance on when to use this tool vs. alternatives. For example, it doesn't mention that you need to call mailchimp_list_campaigns first to get the campaign_id. The context of 'by ID' implies it's for a specific campaign, but no when-not-to-use or alternative conditions.

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

mailchimp_list_audiencesAInspect

View all audiences in your account. Returns audience names, member counts, and engagement stats. Use mailchimp_get_audience for detailed settings.

ParametersJSON Schema
NameRequiredDescriptionDefault
countNoNumber of audiences to return (default 10, max 1000)
offsetNoOffset for pagination (default 0)
_apiKeyYesMailchimp API key (ends with -dc, e.g., abc123-us21)
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 mentions returns 'audience name, member count, and stats', which gives some behavioral insight but does not disclose potential pagination limits (though count/offset are in schema) or any rate limiting or authentication details beyond the schema's apiKey.

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

Conciseness4/5

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

The description is two sentences, front-loading the main action and key return fields. It is concise and to the point, with no unnecessary words.

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

Completeness3/5

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

Given the tool is a list operation with no output schema and 3 parameters, the description is adequate but could be improved by mentioning pagination behavior or typical use cases. It covers the essential information but lacks depth for a fully self-contained description.

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 parameters are well-documented in the schema. The description does not add additional semantics beyond the schema; it simply states the overall purpose. Baseline 3 is appropriate.

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 'List all audiences (lists) in your Mailchimp account' with a specific verb and resource. It differentiates from siblings like mailchimp_get_audience by indicating a list operation with summary stats.

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 for retrieving all audiences, but no explicit when-to-use or alternatives are given. Siblings like mailchimp_get_audience suggest a more detailed single audience retrieval, but the description does not guide when to choose one over the other.

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

mailchimp_list_campaignsBInspect

View all email campaigns. Returns title, type (e.g., "regular", "automation"), status, and send timestamps. Use mailchimp_get_campaign for full details.

ParametersJSON Schema
NameRequiredDescriptionDefault
countNoNumber of campaigns to return (default 10, max 1000)
offsetNoOffset for pagination (default 0)
statusNoFilter by status: save, paused, schedule, sending, sent
_apiKeyYesMailchimp API key
Behavior3/5

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

Annotations are empty, so the description carries the burden. It discloses that campaigns are listed and returns specific fields, but does not mention mutability (likely read-only), rate limits, or authentication details beyond the _apiKey parameter. The description is adequate but not exhaustive.

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

Conciseness4/5

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

The description is concise: one sentence stating the purpose and one sentence listing returned fields. No wasted words.

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

Completeness3/5

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

Given that there is no output schema, the description does not fully explain the return structure (e.g., whether it's an array, pagination details). However, the tool is relatively simple and the schema covers parameters well. The description is minimally complete but could mention pagination or max count.

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 baseline is 3. The description adds no additional parameter meaning beyond the schema's own descriptions. For example, 'status' filter values are already listed in the schema.

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

Purpose4/5

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

The description clearly states the tool lists email campaigns from a Mailchimp account and specifies the returned fields (title, type, status, send time). This differentiates it from siblings like mailchimp_get_campaign (single campaign) and mailchimp_list_audiences (audiences).

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 does not explicitly state when to use this tool versus alternatives. However, the sibling names provide implicit context: use this for listing campaigns, while mailchimp_get_campaign is for a specific campaign. No guidance on filtering or prerequisites is given.

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

mailchimp_list_membersBInspect

Get subscribers in an audience by ID (e.g., "abc123def456"). Returns email addresses, subscription status, and custom merge fields.

ParametersJSON Schema
NameRequiredDescriptionDefault
countNoNumber of members to return (default 10, max 1000)
offsetNoOffset for pagination (default 0)
statusNoFilter by status: subscribed, unsubscribed, cleaned, pending, transactional
_apiKeyYesMailchimp API key
list_idYesAudience/list ID
Behavior3/5

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

With no annotations, the description should disclose behavioral traits. It mentions returns (email, status, merge fields) and implies a read operation. However, it does not mention pagination behavior beyond schema hints, rate limits, or authorization requirements beyond the API key.

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

Conciseness4/5

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

The description is a single concise sentence covering purpose and return fields. No fluff, but could be slightly more structured (e.g., separate sentence for returned fields).

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

Completeness3/5

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

Given 5 parameters, full schema coverage, no output schema, and no annotations, the description is adequate but minimal. It explains the core function but lacks details on pagination, filtering behavior, and error conditions.

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 all parameters. The description adds no extra meaning beyond the schema, so baseline 3 is appropriate.

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 uses specific verbs and resources: 'List members (subscribers) of a specific Mailchimp audience.' It also specifies returned fields (email, status, merge fields), clearly distinguishing it from sibling tools like mailchimp_list_audiences and mailchimp_list_campaigns.

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 for listing subscribers but does not explicitly state when to use this tool vs alternatives. It lacks guidance on prerequisites (e.g., list_id required) or situations where other tools might be more appropriate.

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?

Description explains that memories are stored 'in the session or in previous sessions', providing context about persistence. No annotations provided, so description carries full burden; it adds value by clarifying scope. Would benefit from noting any size limits or expiration, but still strong.

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. First sentence states action and dual behavior, second provides usage context. Front-loaded with 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 retrieval tool with one optional parameter and no output schema, the description is complete enough. It explains behavior with and without key. Could mention return format, but not essential given the tool's simplicity.

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 has 100% coverage with a single parameter 'key' described as 'Memory key to retrieve (omit to list all keys)'. Description adds context about retrieval vs listing, complementing schema well. No additional param info needed.

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 clearly states the tool retrieves a stored memory by key or lists all memories when key is omitted, using specific verb 'Retrieve' and resource 'memory'. Distinguishes from sibling tools like 'remember' and 'forget'.

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?

Explicitly states when to use (retrieve context saved earlier) and provides clear usage pattern: omit key to list all, include key for specific memory. Does not mention alternatives but given the tool's specific function, this is sufficient.

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?

Discloses behavioral differences between authenticated (persistent) and anonymous (24-hour) sessions, which is useful context beyond the schema. No contradictions with annotations (none provided).

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 sentences, no fluff. First sentence defines action, second gives use cases, third adds behavioral nuance. Highly efficient.

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?

Tool is simple with 2 required string params and no output schema. Description fully covers purpose, usage guidance, and behavioral notes. No gaps given the complexity.

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%, and description adds practical context like example keys (subject_property, target_ticker) and value types (findings, addresses). This enriches the bare schema without redundancy.

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?

Clearly states it stores a key-value pair in session memory, with explicit use cases like saving findings, preferences, or context across calls. Distinguishes itself from siblings like 'forget' (deletion) and 'recall' (retrieval).

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?

Explicitly says when to use (save intermediate findings, user preferences, context across tool calls) but does not explicitly mention when not to use or alternatives. However, siblings like 'recall' and 'forget' imply complementary use.

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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