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streamlit-dashboard-mcpserver

QueryForge — Talk to your database. Watch it become a dashboard.

A unified Model Context Protocol server that lets Claude query any SQLite database, retrieve enterprise-specific business logic from a knowledge base, and build live Streamlit dashboards — all from a single conversation.

Project Structure

streamlit-dashboard-mcpserver/
├── .venv/                  # Python virtual environment (managed by uv)
├── data/
│   ├── seed.py             # Generates the sample CRM database
│   └── database.db         # SQLite database (generated by seed.py)
├── knowledge_base/
│   ├── docs/                # Source documents (formulas, business rules, definitions)
│   ├── ingest.py             # Chunks + embeds docs into the vector store
│   └── index/                 # Persisted vector store (generated by ingest.py)
├── .python-version         # Pinned Python version for uv
├── dashboard.py            # Auto-generated by Claude at runtime
├── server.py               # The MCP server
├── uv.lock                 # Dependency lock file
└── README.md

Related MCP server: TheMCP-server

What it does

Tool

Description

list_tables

List all tables in the database

describe_table

Show columns, types, and constraints for a table

sample_table

Return the first N rows of any table

query_database

Run read-only SELECT queries

query_knowledge_base

Retrieve relevant chunks from enterprise docs (custom calculation formulas, business rules, metric definitions) to help Claude write correct queries and dashboard logic

create_dashboard

Write a Streamlit app, auto-install deps, and launch it

stop_dashboard

Stop the running Streamlit process

get_dashboard_status

Check if the dashboard is running and on which port

read_dashboard

Read the current dashboard.py source

Read-only enforced. INSERT, UPDATE, DELETE, DROP and all other write operations are blocked at the server level. The knowledge base is retrieval-only — Claude cannot write back to it through this server.

query_knowledge_base is what makes dashboards correct, not just plausible. Instead of guessing at how your organization defines something like "net revenue" or "active customer," Claude retrieves the actual documented formula from your chunked enterprise docs before writing SQL or dashboard code.

screenshot1-dashboard screenshot2-chat

Prerequisites

  • Python 3.11+ (pinned via .python-version)

  • uv — already used in this project (see uv.lock)

  • Claude Desktop

  • A folder of source documents for the knowledge base (PDF, Markdown, or plain text — e.g. your internal formula sheets, metric glossaries, or SOPs)

Installation

1. Install Claude Desktop

Download and install Claude Desktop for your OS: Windows / macOS: https://claude.ai/download Sign in with your Anthropic account after installing.

2. Clone the repository

HTTPS:

git clone https://github.com/your-username/streamlit-dashboard-mcpserver.git
cd streamlit-dashboard-mcpserver

SSH:

git clone git@github.com:your-username/streamlit-dashboard-mcpserver.git
cd streamlit-dashboard-mcpserver

GitHub CLI:

gh repo clone your-username/streamlit-dashboard-mcpserver
cd streamlit-dashboard-mcpserver

3. Set up the environment with uv

This project uses uv for environment management. The .python-version and uv.lock files are already committed, so setup is a single command.

Install uv if you don't have it:

# Windows (PowerShell)
powershell -ExecutionPolicy ByPass -c "irm https://astral.sh/uv/install.ps1 | iex"

Create the virtual environment and install all dependencies from the lock file:

uv sync

Activate the environment:

# Windows PowerShell
.venv\Scripts\Activate.ps1
# Windows CMD
.venv\Scripts\activate.bat

You will see the project name in your prompt when active:

(streamlit-dashboard-mcpserver) PS C:\Users\benij\ds_project\streamlit-dashboard-mcpserver>

Verify key packages are installed:

pip list | findstr "mcp streamlit"

If anything is missing:

uv pip install mcp streamlit pandas plotly

4. Generate the database

The seed.py script inside data/ generates a realistic CRM database with 10,000+ records across a full snowflake schema.

cd data
python seed.py
cd ..

This creates data/database.db which is what the MCP server reads from.

5. Build the knowledge base index

Drop your enterprise documents (formula sheets, metric definitions, business rules — PDF, Markdown, or .txt) into knowledge_base/docs/, then run:

python knowledge_base/ingest.py

This chunks and embeds the documents, and writes the resulting vector store to knowledge_base/index/. This is what query_knowledge_base reads from at runtime — rerun this script any time the source documents change.

6. Configure Claude Desktop

Claude Desktop reads MCP server definitions from a JSON config file.

Open the config file:

notepad $env:APPDATA\Claude\claude_desktop_config.json

If the file does not exist yet, Notepad will ask to create it — click Yes.

Paste the following config, replacing benij with your Windows username if different:

{
  "mcpServers": {
    "sqlite-dashboard": {
      "command": "C:\\Users\\benij\\ds_project\\streamlit-dashboard-mcpserver\\.venv\\Scripts\\python.exe",
      "args": [
        "C:\\Users\\benij\\ds_project\\streamlit-dashboard-mcpserver\\server.py"
      ],
      "env": {
        "DB_PATH": "C:\\Users\\benij\\ds_project\\streamlit-dashboard-mcpserver\\data\\database.db",
        "DASHBOARD_PORT": "8501",
        "KB_INDEX_PATH": "C:\\Users\\benij\\ds_project\\streamlit-dashboard-mcpserver\\knowledge_base\\index"
      }
    }
  }
}

To confirm your exact Python path, with the venv active run:

where.exe python

Expected output:

C:\Users\benij\ds_project\streamlit-dashboard-mcpserver\.venv\Scripts\python.exe

Use that exact string as the command value in the config.

Always use absolute paths. Claude Desktop launches the MCP server as a subprocess from an unpredictable working directory — relative paths will not resolve correctly.

7. Restart Claude Desktop

After saving the config, fully quit Claude Desktop — right-click the system tray icon → Quit. Then reopen it.

When it restarts, click the 🔨 hammer icon in the bottom-left of the chat input. You should see all 9 tools listed, confirming the server is connected.

Usage

Once connected, talk to Claude naturally:

"What tables are in my database?"

"How do we define 'net revenue' internally?"

"Show me the top 10 customers by total revenue, using our
 company's official revenue formula"

"Build a dashboard with monthly sales trends, a bar chart
 by product category, and a salesperson leaderboard"

Claude will explore the schema, pull relevant business logic from the knowledge base when needed, run queries, write the Streamlit code, install any missing dependencies, and return a URL to open in your browser — http://localhost:8501 by default.

Environment Variables

Set these in the env block of your claude_desktop_config.json:

Variable

Default

Description

DB_PATH

./database.db

Absolute path to your SQLite database

DASHBOARD_PORT

8501

Port Streamlit will listen on

KB_INDEX_PATH

./knowledge_base/index

Absolute path to the vector store built by ingest.py

Troubleshooting

🔨 Hammer icon not showing in Claude Desktop Config JSON is likely invalid — trailing commas and mismatched brackets are common mistakes. Paste it into jsonlint.com to validate. Always fully quit and reopen Claude Desktop after any config change.

"Database not found" error Confirm DB_PATH is an absolute path and database.db exists inside the data/ folder. Run seed.py if it hasn't been generated yet.

query_knowledge_base returns no results / empty index Confirm knowledge_base/docs/ actually has documents in it, then rerun python knowledge_base/ingest.py. Confirm KB_INDEX_PATH in your config points to knowledge_base/index/.

Streamlit page not loading Ask Claude "is the dashboard running?" to call get_dashboard_status. If it's not running, ask Claude to create_dashboard again. Also check that port 8501 isn't already in use by another process.

uv sync fails Make sure your installed Python version matches .python-version. Run python --version to check, and install the correct version from python.org if needed.

PowerShell ExecutionPolicy error when activating .venv

Set-ExecutionPolicy -ExecutionPolicy RemoteSigned -Scope CurrentUser

Then activate again.

About

An MCP server that turns natural language into SQL queries and live, business-logic-aware Streamlit dashboards, powered by Claude and a retrieval-augmented knowledge base of enterprise-specific rules and formulas.

Available Tools

10 tools
create_dashboardB
Creates or updates the Streamlit dashboard with the given Python code.
Automatically installs missing dependencies and starts/reloads the app.

IMPORTANT: The variable DB_PATH is automatically injected at the top of
your code — always connect to the database using:
    conn = sqlite3.connect(DB_PATH)
Never hardcode a database path string yourself.

Args:
    code: Full Python source code for the Streamlit dashboard
ParametersJSON Schema
NameRequiredDescriptionDefault
codeYes

Output Schema

ParametersJSON Schema
NameRequiredDescription
resultYes

TDQS

B3.2/5.0
Behavior3/5

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

No annotations, so the description carries the full load. It discloses helpful side effects (auto-install dependencies, automatic DB_PATH injection) and the create-or-update dual behavior, but omits permission needs, error modes, and whether the update replaces the whole app or merges. Partial behavioral coverage.

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?

Front-loaded with the action, then the caveat about DB_PATH. The 'Args' block is boilerplate but short. Some redundancy between the first sentence and the later 'starts/reloads the app' clause, but overall efficient.

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?

An output schema exists so return values need not be explained. The description covers the key constraint (DB_PATH) and high-level behavior, but does not address what happens on failure, dependency install scope, or how to recover a bad deploy, which matters for an agent invoking a code-writing tool.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters2/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 0% and the only param is described minimally as 'Full Python source code for the Streamlit dashboard.' The important detail about DB_PATH injection is stated as prose rather than tied to the code parameter, and there is no guidance on structure, length, or modules allowed. With low coverage the description should compensate more.

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?

States a specific verb (creates or updates) and resource (Streamlit dashboard) with the input that drives it (Python code). It does not explicitly contrast with siblings like read_dashboard or stop_dashboard, but the lifecycle role is clear from the phrasing.

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 through the code argument and the mention of reloading an existing app, but never states when to use this tool versus stop_dashboard/read_dashboard or what prerequisites exist. Usage is inferable rather than explicit.

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

describe_tableC
Show column names, types, and constraints for a table.

Args:
    table: Name of the table to describe
ParametersJSON Schema
NameRequiredDescriptionDefault
tableYes

Output Schema

ParametersJSON Schema
NameRequiredDescription
resultYes

TDQS

C2.8/5.0
Behavior2/5

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

No annotations are provided, so the description carries the full behavioral burden, yet it says nothing about read-only nature, required permissions, or behavior for a nonexistent table. The statement of what is returned (columns, types, constraints) overlaps with the output schema, so it adds little behavioral disclosure.

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 purpose sentence is short and front-loaded with the key information. The appended 'Args:' block is slightly redundant for a one-parameter tool but costs little.

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?

An output schema exists, so return values need not be explained, and this is a simple one-parameter read operation. Still, nothing addresses error cases, missing tables, or how this differs from list_tables/sample_table, leaving the definition at the minimum viable level.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters2/5

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, but 'Name of the table to describe' only restates the parameter name. It omits useful detail such as whether a schema qualifier is expected, case sensitivity, or how nested/qualified names are handled.

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 gives a specific verb and resource ('Show column names, types, and constraints for a table'), so an agent immediately knows it returns schema metadata. It does not, however, distinguish itself from siblings like list_tables or sample_table, which also operate on table metadata.

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?

There is no explicit when-to-use guidance and no mention of alternatives such as list_tables (for enumeration) or sample_table (for row data). Usage is only implied by the purpose statement, leaving the agent to infer the boundary between this and its siblings.

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

get_dashboard_statusA

Returns whether the Streamlit dashboard is running and on which port.

ParametersJSON Schema
NameRequiredDescriptionDefault

No parameters

Output Schema

ParametersJSON Schema
NameRequiredDescription
resultYes

TDQS

A3.5/5.0
Behavior3/5

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

With no annotations, the description carries the behavioral burden, and it does disclose the essential trait: this is a status/read probe that returns a running flag and a port. It omits any note about authentication, side effects, or what happens when the dashboard is stopped, though for a zero-argument probe that gap is modest.

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?

A single front-loaded sentence with no filler; the returned information is stated immediately with zero waste.

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

Completeness4/5

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

An output schema exists, so the description needn't enumerate return values, and no parameters need explaining. The only missing piece is when to reach for this tool relative to the other dashboard tools.

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 tool takes no parameters, so the baseline of 4 applies; there is no parameter semantics to document. The description correctly adds no redundant parameter commentary.

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?

States a concrete verb and resource ('Returns whether the Streamlit dashboard is running and on which port'), which is specific enough to distinguish it from create_dashboard, stop_dashboard, and read_dashboard. It doesn't explicitly name those siblings, but the status-vs-operate distinction is inherent in the wording.

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 gives no guidance on when to call this versus alternatives such as read_dashboard or create_dashboard, and no preconditions. The use case (checking readiness before another dashboard operation) is only inferable, not stated.

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

knowledge_base_infoA
Returns metadata about the current knowledge base:
total chunks, unique sources, collection name, embedding model.
Useful to verify that PDF ingestion completed successfully.
ParametersJSON Schema
NameRequiredDescriptionDefault

No parameters

Output Schema

ParametersJSON Schema
NameRequiredDescription
resultYes

TDQS

A3.8/5.0
Behavior3/5

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

No annotations are provided, so the description carries the disclosure burden. It signals a read-style metadata call and what is returned, but says nothing about permissions, behavior on an empty/uninitialized knowledge base, or whether the call has any cost or side effects.

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?

Two short sentences, front-loaded with the return payload and followed by the motivating use case. Nothing is padded, though the value could have been sharpened slightly by naming the sibling it contrasts with.

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?

An output schema exists, so return values need not be described, and with zero parameters there is no schema gap to compensate for. The only missing element is any note on failure/empty-state behavior in the absence of annotations.

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 tool takes zero parameters, so there is nothing for the description to clarify; the baseline for a parameterless tool applies. The description adds no spurious parameter-like claims.

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?

Uses a specific verb (returns) with a specific resource (knowledge base) and enumerates the returned metadata: total chunks, unique sources, collection name, embedding model. This clearly separates it from the search-oriented sibling knowledge_search, though it never names that sibling explicitly.

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?

Gives an explicit purpose context: verifying that PDF ingestion completed successfully. It does not state when not to use it or point to an alternative, so it falls short of full when/when-not guidance.

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

list_tablesA

List all tables in the SQLite database.

ParametersJSON Schema
NameRequiredDescriptionDefault

No parameters

Output Schema

ParametersJSON Schema
NameRequiredDescription
resultYes

TDQS

A4.2/5.0
Behavior3/5

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

No annotations are provided, so the description carries the full burden. It only states the purpose but does not disclose any behavioral traits like read-only nature or performance implications, though the operation is obviously safe.

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 extremely concise (five words) and front-loaded, containing no unnecessary 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?

Given zero parameters and a presumably simple output schema, the description is sufficient. It could mention that it returns table names, but the output schema likely covers that.

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 tool has no parameters and schema coverage is 100%, so the description does not need to add parameter info. It appropriately omits such details.

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 explicitly states the action ('List') and the resource ('all tables in the SQLite database'), which is specific and clearly distinguishes from siblings like 'execute' or 'query'.

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 implies when to use (to get all tables), but does not provide explicit guidance on when not to use or mention alternatives. For a simple tool, this is acceptable but lacks some clarity.

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

query_databaseB
Run a SELECT query against the SQLite database.
Only read-only SELECT statements are allowed.

Args:
    sql: A valid SQLite SELECT statement
ParametersJSON Schema
NameRequiredDescriptionDefault
sqlYes

Output Schema

ParametersJSON Schema
NameRequiredDescription
resultYes

TDQS

B3.2/5.0
Behavior3/5

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

With no annotations, the description carries the full burden and partially meets it by disclosing the read-only constraint ('Only read-only SELECT statements are allowed'). It does not cover error handling for non-SELECT input, permissions, or other runtime behavior, so the disclosure is useful but incomplete.

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 short and front-loaded: purpose first, then the key constraint, then the argument. The Args section slightly repeats the SELECT requirement from the opening line, but the overall size is appropriate with minimal waste.

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

Completeness4/5

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

The tool is simple (one parameter) and an output schema exists, so the description need not explain return values. It covers purpose, the read-only constraint, and the parameter meaning, which is nearly sufficient; the main gap is the lack of sibling routing guidance, but that is a minor omission given the tool's straightforward scope.

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 0%, so the description must compensate. It does add meaning by specifying the parameter must be a valid SQLite SELECT statement (not arbitrary SQL), but it offers no detail on result handling, parameter binding, or syntax expectations beyond that. Partial compensation, not full.

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 states a specific verb ('Run') and resource ('SELECT query against the SQLite database'), making the tool's function clear. It does not explicitly distinguish itself from read-oriented siblings like list_tables or sample_table, but the 'arbitrary SELECT' scope is implied well enough for an agent to infer it.

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 only says 'Only read-only SELECT statements are allowed' — a hard constraint, not usage guidance. It gives no indication of when to use query_database versus list_tables, describe_table, or sample_table, leaving the agent to infer routing on its own.

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

read_dashboardB

Returns the current contents of dashboard.py.

ParametersJSON Schema
NameRequiredDescriptionDefault

No parameters

Output Schema

ParametersJSON Schema
NameRequiredDescription
resultYes

TDQS

B3.2/5.0
Behavior2/5

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

With no annotations, the description carries the full behavioral burden. It implies a safe, live read via 'current', but says nothing about what happens when the dashboard does not exist, permissions, or side effects. The output schema covers return values, but behavioral gaps remain.

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?

A single short sentence with the resource stated first and no filler. Every word earns its place and nothing is buried.

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?

The tool is simple (0 params, output schema present), so the description need not explain returns. However, it omits error behavior and any routing hint against its many siblings, leaving the definition minimally adequate rather than complete.

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 tool takes zero parameters, so per the baseline this scores 4. There is nothing for the description to disambiguate, and it correctly does not invent parameter detail.

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 a specific verb (returns) tied to a concrete resource (the contents of dashboard.py), so an agent knows this is a plain read of a file. It does not explicitly differentiate itself from siblings like get_dashboard_status, but the read-vs-status distinction is mostly inferable from the verb.

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?

There is no statement of when to use this tool versus the many siblings (create_dashboard, stop_dashboard, get_dashboard_status). Usage is only implied by the word 'Returns', with no conditions, prerequisites, or alternatives named.

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

sample_tableB
Return the first N rows of a table (default 5, max 50).

Args:
    table: Name of the table to sample
    limit: Number of rows to return (default 5, max 50)
ParametersJSON Schema
NameRequiredDescriptionDefault
limitNo
tableYes

Output Schema

ParametersJSON Schema
NameRequiredDescription
resultYes

TDQS

B3.4/5.0
Behavior3/5

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

With no annotations, the description carries the full behavioral burden. It usefully discloses the default (5) and hard cap (max 50), but says nothing about row ordering (i.e., that 'first N' may be arbitrary without an ORDER BY), required permissions, or whether this is strictly read-only. The cap is the main behavioral fact conveyed.

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 purpose line is front-loaded and the Args block is compact. The default/max values are repeated in both the opening sentence and the args list, which is mild redundancy but acceptable given the schema has no descriptions.

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?

An output schema exists, so return values need not be described. For a simple two-parameter read tool, the description covers purpose, both arguments, and the size constraint adequately; it only lacks sibling disambiguation.

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 description coverage is 0%, so the description must compensate, and it does: both parameters are explained ('table: Name of the table to sample' and 'limit: Number of rows to return (default 5, max 50)'), including the default and constraint. Minor gap in that table-name qualification conventions (schema/catalog prefixes) are not addressed.

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 states a specific verb and resource ('Return the first N rows of a table'), which clearly conveys a sampling operation. It does not, however, differentiate itself from siblings like query_database or describe_table, so an agent must infer the distinction.

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?

There is no guidance on when to use this tool versus query_database, describe_table, or list_tables, all of which are plausible alternatives for inspecting a table. No exclusions, prerequisites, or situational context are provided.

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

stop_dashboardB

Stops the running Streamlit dashboard process.

ParametersJSON Schema
NameRequiredDescriptionDefault

No parameters

Output Schema

ParametersJSON Schema
NameRequiredDescription
resultYes

TDQS

B3.1/5.0
Behavior2/5

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

No annotations are provided, so the description carries the full behavioral burden, yet it only asserts that a process is stopped. It does not disclose whether the operation is idempotent when nothing is running, whether it terminates the process forcibly or gracefully, whether any session state or data is lost, or what permissions are needed for a mutation-style action.

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?

A single compact sentence with the action front-loaded and no filler. It is efficient, though it is arguably too terse for a lifecycle-mutating action, leaving room for a short usage clause without bloat.

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?

An output schema exists, so return-value explanation is not required, and the zero-parameter schema is simple. However, with no annotations and a lifecycle-mutating operation, the description omits the prerequisite state and side effects an agent would need to invoke it correctly.

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 tool takes zero parameters, so there is nothing for the description to disambiguate and the baseline is 4. The schema confirms an empty argument object, matching the description's lack of parameter discussion.

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 states a specific verb ("Stops") and resource ("the running Streamlit dashboard process"), which is unambiguous on its own. It contrasts implicitly with create_dashboard, get_dashboard_status, and read_dashboard by naming the lifecycle action, but never explicitly says how it differs from its siblings.

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?

There is no guidance on when to use this tool versus alternatives such as get_dashboard_status (which would tell you whether a dashboard is running) or create_dashboard. The phrase "the running" implies a precondition but does not state what happens if no dashboard is running or when to prefer this over a status check.

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

Tool Schema Changelog

Recent tool additions, removals, and schema changes observed during successful MCP inspections.

  1. 10 tool updatesv0.1.0
    • First observedcreate_dashboard
    • First observeddescribe_table
    • First observedget_dashboard_status
    • First observedknowledge_base_info
    • First observedknowledge_search
    • First observedlist_tables
    • First observedquery_database
    • First observedread_dashboard
    • First observedsample_table
    • First observedstop_dashboard

TDQS

A3.5/5.0

Scored across 10 tools

Disambiguation5/5

Each tool targets a distinct resource and action: table introspection (list/describe/sample), read-only querying, dashboard lifecycle management, and knowledge-base retrieval. Boundaries are clear, and the read-only query tool is explicitly separated from the preview/schema helpers.

Naming Consistency4/5

Most tools use a predictable verb_noun pattern (list_tables, describe_table, sample_table, query_database, create_dashboard, stop_dashboard, read_dashboard). However knowledge_search and knowledge_base_info flip to a noun_verb/compound form, a minor deviation from the dominant convention.

Tool Count4/5

Ten tools is well-scoped, and each earns its place within its functional group. It does span three distinct concerns (SQLite querying, Streamlit dashboard, knowledge base), which is slightly broad but still justified.

Completeness4/5

Dashboard lifecycle (create/stop/status/read) and table exploration plus read-only querying are well covered. Gaps exist: there is no knowledge-base ingestion tool despite referring to an ingested KB, and no way to modify or delete data.

Maintenance

ActivityMaintained
ResponsivenessNo issues

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