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ZLeventer

salesforce-marketing-mcp

sf_contact_by_email

Find up to 10 Salesforce contacts using an email address. Retrieve contact records to sync or verify customer data in Salesforce Marketing MCP.

Instructions

Find Salesforce contacts by email address (up to 10 matches)

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
emailYesEmail address to look up
Behavior3/5

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

With no annotations provided, the description carries full burden for transparency. It discloses the maximum number of matches (10), which is a useful constraint. However, it does not state whether this is a read-only operation, what happens with no match, or any authentication requirements.

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, front-loaded sentence that conveys the core purpose and a key constraint. Every word is necessary; there is no redundancy or unnecessary detail.

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's simplicity (one required parameter, no output schema, no annotations), the description is mostly adequate. However, it omits details about the output structure (e.g., what contact fields are returned) and error conditions, leaving the agent to infer the response 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?

Schema description coverage is 100%, so baseline is 3. The description adds 'by email address' and the match limit, which provides context beyond the schema's 'Email address to look up'. However, no additional details about email format or case sensitivity are given.

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 identifies the tool's action ('Find'), resource ('Salesforce contacts'), and search criteria ('by email address') with an explicit match limit ('up to 10 matches'). This clearly distinguishes it from sibling tools like sf_search_contacts and sf_get_contact.

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

Usage Guidelines2/5

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

The description provides no guidance on when to use this tool versus alternatives. It does not mention that sf_search_contacts offers broader search capabilities or that sf_get_contact is for specific record lookup by ID. The agent receives no decision context.

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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